Their website is showing part #16795 as a cat back system for the G8 GT.
Priced at $1,038.00. Says call for availability. Is that a good price?

You can find it through a third party for cheaper. I would not be willing to pay that kind of money for it unless they show some major HP gains. You can get there mufflers for VERY cheap and set your own exhaust system up for much cheaper and I am willing to bet that the gains will be similar.

Or wait for Stolen Fox to develop his... He uses Magnaflow mufflers and his or H pipe or their X pipe.

Thats Magnaflows list price. Nobody pays list.

Look for it to retail for around $750.


S.F.

Wholly crap! $1,000 for a Cat-back? What do they think, we're driving Corvette's! :D

Wholly crap! $1,000 for a Cat-back? What do they think, we're driving Corvette's! :D

Its cause they figured we got 361 hp for under "30 grand"
they can jack up the price.... JK

I'm looking forward to hear what the magnaflows sound like......I really liked them on my GTP, at idle. The 3800 sounds like crap anywhere else though. ;)

grandprix borla and corsa catbacks still go for 900+

Wholly crap! $1,000 for a Cat-back? What do they think, we're driving Corvette's! :DLol! Yeah when I saw that price a couple of weeks ago I almost had a heart attack. I paid less than 1/2 of that for the Magnaflows on my Stang.

grandprix borla and corsa catbacks still go for 900+

Those are Borla and Corsa though. Those are expensive exhaust systems on anything. If they made an exhaust setup for my lawn tractor it'd cost $500.

I paid less than $400 NEW for a DynoMax cat-back for my GTP including different tips (because I didn't like the DynoMax ovoid style), for a system that sounded better. Yes, it was aluminized and not stainless, but never had a problem with it here in our harsh winters.

I have it for sale if anyone is interested for their Grand Prix. :D

After doing several cat-back replacements I have arrived at the conclusion that the primary purpose for a cat-back is to make the manufacturer of the cat-back lots of money. They do this really well.

If you want something different, leave the stock piping in place and replace the stock mufflers either with different mufflers or straight piping. You'll spend about 25% of what you would had you installed a cat-back.

Actually, a lot depends on what your plans are with modifying.

Most OEM systems are 2.25" and aren't pure 100% mandrel bent (meaning crimped in sections... ask some F-Body owners about the stock plumbing in their "Y" pipe!).

Anyway, most V8's work best with at least 2.5". When you start doing serious modification, IE boost, motorwork, nitrous, etc, you're obviously moving greater qauntities of air, as such, you do need bigger.

On my GTP, I was running nearly twice the stock level of boost. A stock cat-back wouldn't have been able to support that even with the resonator removed.

dynomax catbacks are alluminized, not stainless steel. They're complete crap and a half.

checkout http://hottexhaust.com/ they usually have all sorts of coupon codes floating around. i got my magnaflow system from them for my gto for like 500 shipped - or something like that - it was by far the best price i found...

dynomax catbacks are alluminized, not stainless steel. They're complete crap and a half.


Here, I'll quote myself where I said that it was aluminized;
I paid less than $400 NEW for a DynoMax cat-back for my GTP including different tips (because I didn't like the DynoMax ovoid style), for a system that sounded better. Yes, it was aluminized and not stainless, but never had a problem with it here in our harsh winters.

As to it's longevity, Despite being "aluminzed" it lasted through two Chicago winters without issue and is in perfect working order and looks no different than the Magnaflow T-304 stainless steel parts I have on my Bonneville now after only 1 Chicago winter! Here we get more salt than snow, so...

DynoMax is made by Walker. Walker is a supplier to the manufacturer's, so if GM can warranty them to last 3 years+ they'll be fine for the average consumer. That was the 6th DynoMax product I've owned without issue

Here, I'll quote myself where I said that it was aluminized;


As to it's longevity, Despite being "aluminzed" it lasted through two Chicago winters without issue and is in perfect working order and looks no different than the Magnaflow T-304 stainless steel parts I have on my Bonneville now after only 1 Chicago winter! Here we get more salt than snow, so...

DynoMax is made by Walker. Walker is a supplier to the manufacturer's, so if GM can warranty them to last 3 years+ they'll be fine for the average consumer. That was the 6th DynoMax product I've owned without issue

Interesting. I take good care, washing and waxing my gp, and it lasted 2 Buffalo winters before both mufflers and the piping completly rusted through. I'll try and dig up the pics.

I called a place here in jersey about the magnaflow catback exhaust and they said with parts and instillation the price was.... 1,500 bucks!!! What do you guys think about that price?

I called a place here in jersey about the magnaflow catback exhaust and they said with parts and instillation the price was.... 1,500 bucks!!! What do you guys think about that price?
I think it's highway robbery!

I think it's highway robbery!

agreed. Don't be foolish.

Guys, just do the mufflers. The stock piping is meant to last 10-15 years. You're not going to get better piping than that in the aftermarket.

Cat-backs are rip-offs extrodinaire. JUST GET NEW MUFFLERS AND AVOID CAT-BACKS LIKE THE PLAGUE!!! :judge:

Just my opinion but I replaced the mufflers and installed an X-pipe instead of the resonator on my GTO, had horrible drone at cruising speeds.

Replaced it with a full Magnaflow Catback and drone went completely away, system was lighter, fit better, had a smoother powerband and had better tips than factory.

Obviously at $1,000 I wouldn't buy the system for the G8 (if I had one) but at $700 or so I would (your gonna pay $300+ for two mufflers and an X pipe, plus installation money) why not buy something engineered for your application.

JMHO.... Carry on!

Just my opinion but I replaced the mufflers and installed an X-pipe instead of the resonator on my GTO, had horrible drone at cruising speeds.

Replaced it with a full Magnaflow Catback and drone went completely away, system was lighter, fit better, had a smoother powerband and had better tips than factory.

Obviously at $1,000 I wouldn't buy the system for the G8 (if I had one) but at $700 or so I would (your gonna pay $300+ for two mufflers and an X pipe, plus installation money) why not buy something engineered for your application.

JMHO.... Carry on!

If you shop you can pick up the mufflers for $50-$70 each (EBay), and a good (honest) muffler shop is not going to charge you much for muffler replacement, so your $300 price is about $150 too much.

$70 for each muffler, $80 for X-pipe (I'm rounding here).

$50 an hour for 3 hours of work is right in line. Wouldn't trust someone doing it for cheaper.

So almost $400 for something you HOPE sounds good. Been there done that, it's cheaper to do it right once.

$70 for each muffler, $80 for X-pipe (I'm rounding here).

$50 an hour for 3 hours of work is right in line. Wouldn't trust someone doing it for cheaper.

So almost $400 for something you HOPE sounds good. Been there done that, it's cheaper to do it right once.

$55 for each muffler, use a Magnaflow dual-in/dual-out for $65 (built-in x-pipe), labor for $50....just a little more than $200 and it worked great (no hope involved).

And if you pay someone 3 hours to do an hours worth of work, it's time to go to a new shop.

if you use coupon code fordtruck8 at hottexhaust you can get the system for $575 shipped.

how long will that coupon last?

if you use coupon code fordtruck8 at hottexhaust you can get the system for $575 shipped.

Thanks for the code. I bit the bullet and ordered it for my GT. Total cost shipped was $574.96. Once I get it I'll post pics and video.

What size pipe is it? What do the tips look like?

Hmmm, wonder when it will be available. Newark, DE makes it 1-day shipping for this and $575 shipped is a good price.

I'd also like to know if this will be a bolt-in kit (piping all the way to the flanges after the cats) or if it will have to be welded.

I spoke to hottexhaust and the systems should be shipping by the end of the month.

Past experience is the coupon code will last forever. If not that specific one there will be another just as easy to find for the same discount.

Don't worry too much about the pricing ... MSRP on the Magnaflow's website is just that ... Manufacturers SUGGESTED Retail Price.

Pricing should be the nearly same as their 2005-2006 GTO kit as it employs 95% the same materials and only some variations in bending and the quad tips. Expect to see 10-15% bump in the ACTUAL market price for the additional SS material and the additional tips. This should keep the kit in competitive pricing somewhere around $500-600 from what I can gather from exisitng market pricing.

The standard 2.5" dual is street legal but eliminates 3 of the five mufflers and is entierely 2.5" throughout the system. Unlike the OEM which has 2" & 2.25" and while mostly mandrel bent still has the lovely OEM crimps, the Magnaflow system is 2.5" flange to dual tips and 100% mandrel bent with no crimps.

Power gains are good with the dual 2.5" and the sound character is a huge improvement over stock and keeps DOD operation sounds in check.

http://www.magnaflow.com/richard/08PontiacG8GT/g8.JPG

oh ... and BTW the dual 3" set-up is not for the faint of heart. It will be marketed as a Magnaflow "AGRESSIVE note."

pics soon

i've had several catback exhausts from Greddy and HKS.. i can tell you from experience that they were top quality systems that sounded great and performed excellent.. no way would i buy some mufflers and pay some jack ass at Midas to weld under my new 30k car...

and BTW the dual 3" set-up is not for the faint of heart. It will be marketed as a Magnaflow "AGRESSIVE note."

Please explain in detail. Sounds like what I want.

Guys, just do the mufflers. The stock piping is meant to last 10-15 years. You're not going to get better piping than that in the aftermarket.

Cat-backs are rip-offs extrodinaire. JUST GET NEW MUFFLERS AND AVOID CAT-BACKS LIKE THE PLAGUE!!!

You mean to tell me you like cut up and welded exhaust in 2 to 3 places better than a seemless well engineered catback???? I hope you have proof that catbacks are a waste of money and dont provide any benefits over just mufflers only!!!:nuts:

Don't worry too much about the pricing ... MSRP on the Magnaflow's website is just that ... Manufacturers SUGGESTED Retail Price.

Pricing should be the nearly same as their 2005-2006 GTO kit as it employs 95% the same materials and only some variations in bending and the quad tips. Expect to see 10-15% bump in the ACTUAL market price for the additional SS material and the additional tips. This should keep the kit in competitive pricing somewhere around $500-600 from what I can gather from exisitng market pricing.

The standard 2.5" dual is street legal but eliminates 3 of the five mufflers and is entierely 2.5" throughout the system. Unlike the OEM which has 2" & 2.25" and while mostly mandrel bent still has the lovely OEM crimps, the Magnaflow system is 2.5" flange to dual tips.

Power gains are good with the dual 2.5" and the sound character is a huge improvement over stock and keeps DOD operation sounds in check.

http://www.magnaflow.com/richard/08PontiacG8GT/g8.JPG

oh ... and BTW the dual 3" set-up is not for the faint of heart. It will be marketed as a Magnaflow "AGRESSIVE note."

pics soon

Where did this dyno graph come from?

Please explain in detail. Sounds like what I want.



You mean to tell me you like cut up and welded exhaust in 2 to 3 places better than a seemless well engineered catback???? I hope you have proof that catbacks are a waste of money and dont provide any benefits over just mufflers only!!!:nuts:

The dual 3 inch system makes power over stock and just a bit more than the 2.5 inch system however it is really engineered for those seeking to push modifications beyond the simple bolt-on modification realm. Coupled to the stock calibrated motor and power levels, this system is LOUD ... > 95 dba SAE J1169. More tailpipe output and more interior feedback. People seeking more power through custom calibrations and the elimination of DOD / AFM with boost applications will be quite content.

The 2.5 inch system makes nearly the same power but can keep the spectrum of normal operation to DOD / AFM sounds in check. There is a substantial increase in exhaust feedback provided but nothing to make the expereince of daily driving uncomfortable but any means.

As far as those who believe the stock system is sufficient, they are right. It will support stock hp but as can be seen in the dyno i provided, by no means is "supporting" stock power levels the same as optimizing stock power levels. The stock system consists of 5 mufflers and in all honesty the rear mufflers are not the primary restrictions. The mid body resonators are in fact 2" core mufflers surrounded by both 2.25" and 2" tubing. The rear mufflers do a good deal of the noise attenuation but are much better at handling the exhaust flow than the center sections of the exhaust system.

The results are not suprising, LSx motors and dual 2.5" exhaust testing should be nothing new to the market. The G8 simple introduces a varaint of the performance platform with DOD / AFM to the US non-truck market.

Pre-release photos will be available shortly for both systems and details of the US spec exhaust will be made available.

Where did this dyno graph come from?

2008 G8 equiped with prototype 2.5" Magnaflow exhaust.

2008 G8 equiped with prototype 2.5" Magnaflow exhaust.

Thank you. I should have been more specific. Is this from Magnaflows' dyno? Also was the vehicle stock and the only thing changed was the exhaust?

Thanks again...

The dual 3 inch system makes power over stock and just a bit more than the 2.5 inch system however it is really engineered for those seeking to push modifications beyond the simple bolt-on modification realm. Coupled to the stock calibrated motor and power levels, this system is LOUD ... > 95 dba SAE J1169. More tailpipe output and more interior feedback. People seeking more power through custom calibrations and the elimination of DOD / AFM with boost applications will be quite content.

The 2.5 inch system makes nearly the same power but can keep the spectrum of normal operation to DOD / AFM sounds in check. There is a substantial increase in exhaust feedback provided but nothing to make the expereince of daily driving uncomfortable but any means.

As far as those who believe the stock system is sufficient, they are right. It will support stock hp but as can be seen in the dyno i provided, by no means is "supporting" stock power levels the same as optimizing stock power levels. The stock system consists of 5 mufflers and in all honesty the rear mufflers are not the primary restrictions. The mid body resonators are in fact 2" core mufflers surrounded by both 2.25" and 2" tubing. The rear mufflers do a good deal of the noise attenuation but are much better at handlign the exhaust flow thatn the center sections of the exhaust system.

The results are not suprising, LSx motors and dual 2.5" exhaust testing should be nothing new to the market. The G8 simple introduces a varaint of the performance platform with DOD / AFM to the US non-truck market.

Pre-release photos will be available shortly for both systems and details of the US spec exhaust will be made available.

Do you happen to have a schematic of the stock system and/or a comparison schematic of stock vs. Magnaflow systems? I am wanting to see how the system was changed holistically.

Also, if you happened to have pictures of the internals of the stock mufflers, with their locations, I know of a few people here who would be very appreciative. Thanks!

Thank you. I should have been more specific. Is this from Magnaflows' dyno? Also was the vehicle stock and the only thing changed was the exhaust?

Thanks again...

Indeed from Magnaflow's dyno. The test vehicle had about 1500 miles on it with test conditions varying no more than by a 2% deviation

Test vehicle was a 2008 G8 GT Premium package with 18" wheels - stock exhaust vs 2008 G8 GT Premium package with 18" wheels - Magnaflow 2.5" exhaust.

Do you happen to have a schematic of the stock system and/or a comparison schematic of stock vs. Magnaflow systems? I am wanting to see how the system was changed holistically.

Also, if you happened to have pictures of the internals of the stock mufflers, with their locations, I know of a few people here who would be very appreciative. Thanks!

Once the Server is back up I will link the OEM system pics. Maybe tomorrow maybe Monday but no later than next week.

Do you happen to have a schematic of the stock system and/or a comparison schematic of stock vs. Magnaflow systems? I am wanting to see how the system was changed holistically.

Also, if you happened to have pictures of the internals of the stock mufflers, with their locations, I know of a few people here who would be very appreciative. Thanks!

This is not a schematic but you can look at the physical differences from this image. This is the Magnaflow protoype#2 system next to the OEM.

http://www.magnaflow.com/richard/08PontiacG8GT/MF%2025%20vs%20OEM%20225%2020.JPG

You can see, the bending was simplified in the Magnaflow part to create a straighter path with fewer bends and the tube diameter remains 2.5" the entire profile. The OEM starts as 2.25" from the flanges to the dual in and dual out resonator and then reduces to a 2.0" pipe between the dual in / dual out resonator to the small bullet mufflers. From there the OEM is back to 2.25" tubing for the remainder of the underbody piping.

If you would like to see more detailed shots please let me know as I have a good deal more but just to many to post.

This is not a schematic but you can look at the physical differences from this image. This in the Magnaflow protoype 2 system next to the OEM.

....

If you would like to see more detailed shots please let me know as I have a good deal more but just to many to post.

Can you post the additional pics on Photobucket ( free ) ??
Thanks,
- Ray
Interested...

Can you post the additional pics on Photobucket ( free ) ??
Thanks,
- Ray
Interested...

Cost $$ is not the issue just time. I have nearly 100 images for reference and engineering ... here are some more.

http://www.magnaflow.com/richard/08PontiacG8GT/g8%20stock%20under.JPG

http://www.magnaflow.com/richard/08PontiacG8GT/G8%2025inch.JPG

This is not a schematic but you can look at the physical differences from this image. This in the Magnaflow protoype 2 system next to the OEM.

You can see the bending was simplified in the Magnaflow part to create a straighter path with fewer bends and the tube diameter remains 2.5" the entire profile. The OEM starts as 2.25" from the flanges to the dual in and dual out resonator and then reduces to a 2.0" pipe between the dual in / dual out resonator to the small bullet mufflers. From there the OEM is back to 2.25" tubing for the remainder of the underbody piping.

If you would like to see more detailed shots please let me know as I have a good deal more but just to many to post.

Nice work. :us_flag:

If I understand you correctly, you are making 2 systems - this one, and one that is nearly identical, except that it has 3" piping instead of 2.5", is that correct? Are these the only two systems you are making?

Also, where is the power made....I know that huge can in back of the axle is a maze of internal tubing and fiberglass. What about the other three mufflers on the stock system, what do those look like on the inside?

We have completed testing on two systems. As of yet only the 2.5" systems are compliant from a street legal stand point (SAE J1169 noise.) For a daily driver the 3" is overkill but I am evaluating this variant to support some of the new G8 modifications just around the corner.

Here is a 3.0" and 2.5" prototype test system. The 3.0" on the left and the 2.5" on the right. We have been in testing for the past few weeks and as you can see these have been exposed to a good deal of on-car evaluation:

http://www.magnaflow.com/richard/08PontiacG8GT/MF%203%20vs%2025.JPG

The 2.5" system will run into production shortly but, I may be holding on to the 3" part pending some other evaluations. I have a new PCM calibration I am working on and a potential LT header supplier. I will continue to evaluate the 3.0" system for the G8 GT but as it appears it does not provide any more benefit than the 2.5 system with a stock calibration with stock manifolds with OEM cats. I feel the simple combination of these two modifications will bring out the dual 3" system's potential. Boost, increased displacement or heads and cam modifications will of course shine as well.

Here is the 3" system on the car:

http://www.magnaflow.com/richard/08PontiacG8GT/3%20in%20G8.JPG

Some close ups of the Oval tip variation ... still not a green light but in consideration.

http://www.magnaflow.com/richard/08PontiacG8GT/g8%20oval%20concept.JPG

We still have some work ahead of us with regards to the 3" dual but again the 2.5" system is ready for production and should be working its way through our distributor network.

The same muffler is used for both sets correct???

Systems look great.

I would think that with a 3" system you would need to be putting down some serious HP. Otherwise your low end is going to be pretty bad.

Great looking stuff oxidizer!

There's a reason that Magnaflow has always been my preferrence.......


I'd love to have all that CNC mandrel bending equipment and my disposal!



S.F.

Systems look great.

I would think that with a 3" system you would need to be putting down some serious HP. Otherwise your low end is going to be pretty bad.

Contrary to exhaust folklore, the larger 3" system does not show a notable loss at WOT from 2000-3500 rpm compared to the 2.5" system. When cruising / casual driving the 3" system tends to feel a bit sluggish on tip in with stock power levels but after tip in the feel is nearly identical. Testing shows that the back pressure drop from 2.5" to 3.0" was less than .25-.50 psi at 3000 rpm. While this is notable, it is not as substantial as the change in tubing volume might suggest. Simply stated, other variables upstream are still contributing to the small change in back pressure. The catalyst or manifolds may be the culprit.

The 3" system, does however have one downside on the stock power level vehicle. The exhaust speed at low rpms has dropped enough to make controlling DOD / AFM noise, resonance and other exhaust harmonics more difficult. As total exhaust flow is increased with other modifications, the 3" system will be able to function more effectively.

All I have to say is WOW! These systems look incredible.

Did you ever consider having just one muffler with a built in X inside it up front instead of the two mufflers out back? I would think it would save weight, flow the same, and be cheaper, but would it be very much louder?

How much louder is the 2.5" system than the factory at idle, cruising, and WOT? Do you have db numbers by any chance?

All I have to say is WOW! These systems look incredible.

Did you ever consider having just one muffler with a built in X inside it up front instead of the two mufflers out back? I would think it would save weight, flow the same, and be cheaper, but would it be very much louder?

How much louder is the 2.5" system than the factory at idle, cruising, and WOT? Do you have db numbers by any chance?

A single mid body muffler was insufficient for noise control and required two additional rear resonators. Keeping in mid heat and sheilding requirments the muffler would sacrifice about 1" of ground clearance over the 2.5" as we designed it and 0.5" over the 3".

Here are the Noise Levels as tested on the two systems shown in this thread

Stationary Tailpipe - SAE J1169 testing standards
--------------Stock----2.5"----3.0"
Curb idle -------68------77------78
1500 rpm ------69------84------87
3000 rpm ------77------90------95
3/4 Peak HP ---80------94------97

Driving Interior
--------------Stock----2.5"----3.0"
Acceleration
30-40 mph ----71------79------79
50-70 mph ----73------75------79

Cruising
40-50 mph ----70------71------71
60-70 mph ----72------72------74

...

Here are the Noise Levels as tested on the two systems shown in this thread

Stationary Tailpipe - SAE J1169 testing standards
--------------Stock----2.5"----3.0"
Curb idle -------68------77------78
1500 rpm ------69------84------87
3000 rpm ------77------90------95
3/4 Peak HP ---80------94------97

Driving Interior
--------------Stock----2.5"----3.0"
Acceleration
30-40 mph ----71------79------79
50-70 mph ----73------75------79

Cruising
40-50 mph ----70------71------71
60-70 mph ----72------72------74


OK, 3, actually:

Q0 = Est MSRP?
Q1 = Is the 2.5" legal ( sound levels ) in all states?
Q2 = Drone?
In the car - At steady speeds & when accelerating?
Thanks,
- Ray
Fought drone with my GM 6.0L V8 ...

A single mid body muffler was insufficient for noise control and required two additional rear resonators. Keeping in mid heat and sheilding requirments the muffler would sacrifice about 1" of ground clearance over the 2.5" as we designed it and 0.5" over the 3".

Here are the Noise Levels as tested on the two systems shown in this thread

(--snip--)

I just want to applaud you and your company for your openness and friendlyness in the development of your catback system. Too many manufacturers won't give you information that you beg for, if they even respond to you at all. Yet here you are posting detailed pics, volume levels, some specs and discussing the development with your potential customers. You guys rock in my book! :bubbrubb:

oxidizer, what about sound levels when AFM/DOD is active? I find with the stock system to be a bit annoying with vibration and sound levels to the point of considering deactivating the DOD system via an ECM mod.

I just want to applaud you and your company for your openness and friendlyness in the development of your catback system. Too many manufacturers won't give you information that you beg for, if they even respond to you at all. Yet here you are posting detailed pics, volume levels, some specs and discussing the development with your potential customers. You guys rock in my book! :bubbrubb:

:iagree: Thank you so much for your help! The 2.5 inch looks like a winner for me! :drool:

OK, 3, actually:

Q0 = Est MSRP?
Q1 = Is the 2.5" legal ( sound levels ) in all states?
Q2 = Drone?
In the car - At steady speeds & when accelerating?
Thanks,
- Ray
Fought drone with my GM 6.0L V8 ...

A0- MSRP is listed on the website however actual pricing can be found through one of our retailers as we do not sell direct. Check the column on the left for site sponsors.

A1- The 2.5" system is SAE J1169 noise compliant which is the Federal standard. Local laws can however have other limitations which can be more stringent.

A2 - Drone or Resonance is something that is hard to quantify or provide accurate description in words that truely mean something when interpreted by two different people. With that said, I can say that I am very sensitive to resonant frequencies and more often than not drive with the windows up and without the radio. Anything that is obnoxious or obtrusive just doesn't fly with me. I like hearing the motor but "noise" is not acceptable.

The typical trouble rpms for the 6.0 LSx motors is 1800-2200 and the sound level is only slightly more appearant when cruising with noise being introduced only during DOD / AFM. During DOD /AFM the frequency changes and not the amplitude which means to the dba meter reads the same sound output level however due to the change in frequency the noise become more appearant. The stock system simlpy masks this noise with a good deal more mufflers to lower the level to the point it is almmost unheard but you still "feel" the change in frequency. I would not say that the 2.5" system has a drone problem under cruise or acceleration.

oxidizer, what about sound levels when AFM/DOD is active? I find with the stock system to be a bit annoying with vibration and sound levels to the point of considering deactivating the DOD system via an ECM mod.

I would say the DOD / AFM is more noticable but not obstrusive in the 2.5" system. The 3" system however just does not have the ability to control the sound with the dramatic change in exhaust velocity that occurs with the larger tubing. You will still "feel" the frequency change with either and the switch is noticable.

:iagree: Thank you so much for your help! The 2.5 inch looks like a winner for me! :drool:

I couldn't have said it better myself. I am in total shock that you are discussing all of these things with us. Most manufacturers are greedy with their info. All of this information you have given us has sold me on getting a Magnaflow catback for my car once they are available.

Job well done oxidizr!!!!

The same muffler is used for both sets correct???

same outer dimensions, different internals.

Thanks for all the good info and I look forward to the release.

"A2 - Drone or Resonance is something that is hard to quantify or provide accurate description in words that truely mean something when interpreted by two different people. With that said, I can say that I am very sensitive to resonant frequencies and more often than not drive with the windows up and without the radio. Anything that is obnoxious or obtrusive just doesn't fly with me. I like hearing the motor but "noise" is not acceptable.

The typical trouble rpms for the 6.0 LSx motors is 1800-2200 .... "

Thanks for taking the time to answer my questions.

I am particularly cautious because of my ( expensive & time-consuming ) experience with my current Corvette Coupe.

My C6 Corvette has the 6.0L V8 and A6 trans. – and this drivetrain combination is well documented to be much more prone to drone with aftermarket exhausts.

I changed the ( much, MUCH too quiet ) Corvette OEM mufflers to a Flowmasters ( Quad Tip ) over-axle system, and shortly thereafter changed the stock H-pipe ( no resonators or mufflers ) to a Corsa H-pipe w/dual resonators – to reduce the volume and the drone.

On ‘general acceleration’, the background harsh tones I heard with just the Flowmasters ( others clearly are NOT bothered by this or there is dramatic car-to-car variation ) is reduced at every combination of RPM and throttle opening. Under general acceleration, at 1500-2000 I hear much more of the deep tones I was looking for, and much, much less of the ‘other’ tones ( noise ) I wanted to reduce or eliminate. The ‘good’ notes are still there.

The H-pipe has essentially eliminated any drone in the RPM range critical to me: 70 – 80 MPH cruise ( = 1550 to 1750 ), where I spend a lot of my highway travel time. Traveling at this speed is now a pleasure.

There is still a bit of what I’ll call ‘drone’ in the 65 MPH range. Not nearly as loud \ noticeable as before - but clearly present. I can drive around or tolerate this.

Let me try to define \ describe how drone manifested itself to MY ears in THIS circumstance:

If you were settled in & listening to a flute or a harp solo - and someone else on the stage with a Tuba started to blow a single, low note – you might still be able to hear the flute that you were hearing before, but your enjoyment would be substantially reduced by that overlay of the loud, low, single tone.

To me, this is analogous to the issue of drone for me in my C6. Meaning: The Flowmasters allow much more of the deeper & distinctly V8 tones I wanted to hear when I changed the exhaust. But also, simultaneously, they generated what I found to be a harsh, discordant note - something I found very obnoxious. This was apparent on acceleration and at almost any steady throttle opening.

The Corsa H-pipe reduced the overall volume, but only a moderate amount. It is clearly still louder than stock. ( As I wanted. ) But it is in no way obnoxiously loud.

The H-pipe virtually eliminated the drone in the highway cruising speed range I really cared most about. ( 70 – 80 MPH = approx. 1550 RPM and above. )

The H-pipe reduced the drone on general acceleration to the point that it is much less noticeable. And much more enjoyable. To me.

The distinctly V8 nature of the exhaust note is now quite apparent & relatively ‘pure’ under most conditions. More melodic and harmonious, rather than discordant or dissonant or grating?

I agree that it is hard to describe, and ( clearly ) people hear differently & are (in-)sensitive to different frequencies & volumes of exhaust tone.

Just my 0.02 gallons worth . . .
- Ray
Now a happier C6 driver . . .

How is this thing shipped? It would have to be a pretty big box, and if it comes in pieces does it still need to be welded together?

Well, I'm sold.

Me too.......just waiting for it to show up for ordering.

"A2 - Drone or Resonance is something that is hard to quantify or provide accurate description in words that truely mean something when interpreted by two different people. With that said, I can say that I am very sensitive to resonant frequencies and more often than not drive with the windows up and without the radio. Anything that is obnoxious or obtrusive just doesn't fly with me. I like hearing the motor but "noise" is not acceptable.

The typical trouble rpms for the 6.0 LSx motors is 1800-2200 .... "

Thanks for taking the time to answer my questions.

I am particularly cautious because of my ( expensive & time-consuming ) experience with my current Corvette Coupe.

My C6 Corvette has the 6.0L V8 and A6 trans. – and this drivetrain combination is well documented to be much more prone to drone with aftermarket exhausts.

I changed the ( much, MUCH too quiet ) Corvette OEM mufflers to a Flowmasters ( Quad Tip ) over-axle system, and shortly thereafter changed the stock H-pipe ( no resonators or mufflers ) to a Corsa H-pipe w/dual resonators – to reduce the volume and the drone.

On ‘general acceleration’, the background harsh tones I heard with just the Flowmasters ( others clearly are NOT bothered by this or there is dramatic car-to-car variation ) is reduced at every combination of RPM and throttle opening. Under general acceleration, at 1500-2000 I hear much more of the deep tones I was looking for, and much, much less of the ‘other’ tones ( noise ) I wanted to reduce or eliminate. The ‘good’ notes are still there.

The H-pipe has essentially eliminated any drone in the RPM range critical to me: 70 – 80 MPH cruise ( = 1550 to 1750 ), where I spend a lot of my highway travel time. Traveling at this speed is now a pleasure.

There is still a bit of what I’ll call ‘drone’ in the 65 MPH range. Not nearly as loud \ noticeable as before - but clearly present. I can drive around or tolerate this.

Let me try to define \ describe how drone manifested itself to MY ears in THIS circumstance:

If you were settled in & listening to a flute or a harp solo - and someone else on the stage with a Tuba started to blow a single, low note – you might still be able to hear the flute that you were hearing before, but your enjoyment would be substantially reduced by that overlay of the loud, low, single tone.

To me, this is analogous to the issue of drone for me in my C6. Meaning: The Flowmasters allow much more of the deeper & distinctly V8 tones I wanted to hear when I changed the exhaust. But also, simultaneously, they generated what I found to be a harsh, discordant note - something I found very obnoxious. This was apparent on acceleration and at almost any steady throttle opening.

The Corsa H-pipe reduced the overall volume, but only a moderate amount. It is clearly still louder than stock. ( As I wanted. ) But it is in no way obnoxiously loud.

The H-pipe virtually eliminated the drone in the highway cruising speed range I really cared most about. ( 70 – 80 MPH = approx. 1550 RPM and above. )

The H-pipe reduced the drone on general acceleration to the point that it is much less noticeable. And much more enjoyable. To me.

The distinctly V8 nature of the exhaust note is now quite apparent & relatively ‘pure’ under most conditions. More melodic and harmonious, rather than discordant or dissonant or grating?

I agree that it is hard to describe, and ( clearly ) people hear differently & are (in-)sensitive to different frequencies & volumes of exhaust tone.

Just my 0.02 gallons worth . . .
- Ray
Now a happier C6 driver . . .

The C6 was a project that needed a good deal of attention in our development process. If you are familiar with our offering it was one of the first released and unique in design when compareed to the OEM and competitive products. We had spent a good deal of time with the A6 to find how to work around its tendency to place the vehicle in the problematic drone frequency range under lightly loaded conditions. I am not sure if you have had the opportunity to experience the C6 A6 with our complete system installed but from our testing and a good deal of the feed back we received from initial buyers the "drone" problem was well addressed.

The G8 provides us with a good deal more of a challenge in that its a 6.0L and it has DOD / AFM. Couple that with the fact the G8 has a spacious interior and you have a introduced more variables to consider in building a performance exhaust system. In any case, there are trades which have to be made. In wanting to hear more of the good notes, some of the undesirable noise will be allowed to pass.

Understanding and using available exhaust tuning and cancellation technologies today, would still pose the problem of having to remove some of the desirablle notes to contend with noise or total level while controlling drone or resonance. The OEM exhaust is a good example of the extreme end of this ... the car sounds neutered. Since the sound we enjoy is not exclusively high frequency or low frequency but a combination of harmonics throughout the sound spectrum, sound cancellation devises risk removing some of the good sound character along with the bad and other absorbtion techniques do not adequqately address some of the problematic drone or resonant frequencies.

If this was not enough to contend with, once you have a system that can address these issues you now need to make the same system function with half the exhaust volume and a dramatically lower velocity while in DOD / AFM. Imagine having an exhaust system optimized for the 360 HP the motor makes and then compliant for street use. Now take that system and place it on a 100 hp V4 operating only in lower rpm conditions and expect to find good results. Contending with these extremes in conditions is a good deal more than just putting together a good exhaust system. It's finding the right level of output that will satisfy your desire for a V8 rumble when you are on the throttle but still keeping in check the V4 operation for those moments you just want to cruise.

We really tried to put all of this together in the design of this system. I already know I cannot expect to meet everyones expectations for exhaust noise vs exhaust note but we have put a real concerted effort into finding a medium that we feel should meet the needs of most enthusiasts.

How is this thing shipped? It would have to be a pretty big box, and if it comes in pieces does it still need to be welded together?

The system is a bolt-on system that requires no welding and uses band clamps at each union. This aids in shipping size and adjustability for optimal fitment considering minor chassis variations from car to car. No special shipping is required.

The C6 was a project that needed a good deal of attention in our development process. If you are familiar with our offering it was one of the first released and unique in design when compareed to the OEM and competitive products. We had spent a good deal of time with the A6 to find how to work around its tendency to place the vehicle in the problematic drone frequency range under lightly loaded conditions. I am not sure if you have had the opportunity to experience the C6 A6 with our complete system installed but from our testing and a good deal of the feed back we received from initial buyers the "drone" problem was well addressed.

The G8 provides us with a good deal more of a challenge in that its a 6.0L and it has DOD / AFM. Couple that with the fact the G8 has a spacious interior and you have a introduced more variables to consider in building a performance exhaust system. In any case, there are trades which have to be made. In wanting to hear more of the good notes, some of the undesirable noise will be allowed to pass.

Understanding and using available exhaust tuning and cancellation technologies today, would still pose the problem of having to remove some of the desirablle notes to contend with noise or total level while controlling drone or resonance. The OEM exhaust is a good example of the extreme end of this ... the car sounds neutered. Since the sound we enjoy is not exclusively high frequency or low frequency but a combination of harmonics throughout the sound spectrum, sound cancellation devises risk removing some of the good sound character along with the bad and other absorbtion techniques do not adequqately address some of the problematic drone or resonant frequencies.

If this was not enough to contend with, once you have a system that can address these issues you now need to make the same system function with half the exhaust volume and a dramatically lower velocity while in DOD / AFM. Imagine having an exhaust system optimized for the 360 HP the motor makes and then compliant for street use. Now take that system and place it on a 100 hp V4 operating only in lower rpm conditions and expect to find good results. Contending with these extremes in conditions is a good deal more than just putting together a good exhaust system. It's finding the right level of output that will satisfy your desire for a V8 rumble when you are on the throttle but still keeping in check the V4 operation for those moments you just want to cruise.

We really tried to put all of this together in the design of this system. I already know I cannot expect to meet everyones expectations for exhaust noise vs exhaust note but we have put a real concerted effort into finding a medium that we feel should meet the needs of most enthusiasts.


Extremely well explained!

Can it be assumed that chambered mufflers (which already are more prone to producing heavy interior resonance and drone) will be much more problematic in this application?

I wonder how many enthusiasts will de-activate DOD to completely eliminate the possibilty of undesirable exhaust tones while in V4 mode? An interesting comparision would be fuel mileage bone stock vs a G8 GT that is more efficient via performance exhaust, CAI and proper engine tuning.

I believe it was VMS that has already shown a mileage improvement via their tuning............

S.F.

Great looking setup. From the pictures it looks like the stainless steel dual tips on each side are not slant cut or staggered like the stock exhaust. Is this correct? Can you give a close up of the exhaust tips at an angle?

oxidizr - do you think wrapping the entire exhaust system with "header wrap" would reduce the noise even more? I have seen people do this in the past and it helped with noise to an extent. Would it have any adverse affects on the lifespan of the exhaust system since it is stainless?

Sorry, but in my old age I want my car to be as quiet as possible except at WOT lol

oxidizr - do you think wrapping the entire exhaust system with "header wrap" would reduce the noise even more? I have seen people do this in the past and it helped with noise to an extent. Would it have any adverse affects on the lifespan of the exhaust system since it is stainless?

Sorry, but in my old age I want my car to be as quiet as possible except at WOT lol

Sounds like what you need is a nice quiet exhaust and a set of electrically operated cutouts. :)

Sounds like what you need is a nice quiet exhaust and a set of electrically operated cutouts. :)

That is what I have on my Z28 now :)

oxidizr - what about adding another dual in dual out muffler to this setup and putting electric cutouts before the rear mufflers? :gears:

These look GREAT! I have the Magnaflow CB on my Goat and love it! Top notch workmanship and at a dam* good price to boot. And LOVE LOVE LOVE the 3".....now make that for my 04 GTO!!!!! :)

That is what I have on my Z28 now :)

oxidizr - what about adding another dual in dual out muffler to this setup and putting electric cutouts before the rear mufflers? :gears:

From the feedback I am getting, it seems I may forgo the 3" system for an additional 2.5" system that will focus on keeping the DOD / AFM in check and tweak the existing offering for a little more sound. I will be looking into this some more and keeping you updated.

As far as Electric cutouts go there are two concerns and this applies to any "muffler bypass or like devise.:"

(1) LEGALITY - They are illegal to even have, not only use, on any street legal vehicle. Many local inpections will fail a vehicle for the simple fact one has been installed on a vehicle.

(2) FUNCTIONALITY - They just dont work ... very long. I have used them all and even engineered my own. Leakage is an issue, shorting, jamming and breaking seem to always be issues. They are great novelties but the only one I felt worked was one i built using a pneumatic linear actuator and it was by no means cost effective or size conscious (for my Silverado.)

Oxidizr,

I have already pre-order your exhast through Hottexhaust.com. When can we expect shipping of the first sets?

I can't wait to get this system on my car! :gears:

Thanks

From the feedback I am getting, it seems I may forgo the 3" system for an additional 2.5" system that will focus on keeping the DOD / AFM in check and tweak the existing offering for a little more sound. I will be looking into this some more and keeping you updated.

I would be very interested in a system that eliminates all of the inefficiencies of the stock system (i.e. varying size pipes, non-mandrel bends), but is still whisper quiet. I am guessing that what I am looking for is a modification of the 2.5" system that is prototyped here, but includes more Magnaflow straight-through mufflers, in-line.

For example, rather than the x-pipe in the protytpe 2.5" system, what I am thinking is to use the Magnaflow large-can muffler with the built-in x-pipe, which would still offer x-pipe-type scavenging. Then adding some of the Magnaflow bullet-style, straight-through mufflers, similar to those in the stock system, would keep noise down even more while optimizing efficiency.

That's my wish anyway. I would have a great-flowing, quiet system, then if I added mods down the road, I would already have an excellent flowing exhaust.

Long behold the sound clips with video are up:

http://www.magnaflow.com/04sound/sportsound/08G8/08G8.html

Sounds good !!!

Wow - I definitely like this exhaust. It's driving me absolutely crazy how quiet this car is...this is in serious consideration.

Assume that's the 2.5" one that's already shipping?

damn, when will this be able to ship?

Long behold the sound clips with video are up:

http://www.magnaflow.com/04sound/sportsound/08G8/08G8.html

Sounds good!
Can one paint the actual ( polished? ) mufflers black -
with some high temp flat back paint?
Thanks,
- Ray
Appreciate the updates.....

Sounds good!
Can one paint the actual ( polished? ) mufflers black -
with some high temp flat back paint?
Thanks,
- Ray
Appreciate the updates.....

Ray,

Duplicolor ultra high heat w/cermaic is what you want. Its rated at 1200 degrees and can be obtained at any auto parts store.

Make sure it says 1200 and not 500 degrees as they offer both styles.

S.F.

Ray,

Duplicolor ultra high heat w/cermaic is what you want. Its rated at 1200 degrees and can be obtained at any auto parts store.

Make sure it says 1200 and not 500 degrees as they offer both styles.

S.F.


I see ...
I did not know if the 'polishing' would alter the
ability to ( hold ) paint.
I'd just prefer that the only 'shiny' bits back there be the
quad tips themselves....
Thanks!
- Ray
( still ) Not an exhaust system expert...

Long behold the sound clips with video are up:

http://www.magnaflow.com/04sound/sportsound/08G8/08G8.html

Wow, that is quieter than I thought it was going to be..... I like it :)

If it could be made even quieter but still flow the same I would probably get that setup instead though ;)

I can't wait for this to be available. :gears:

I see ...
I did not know if the 'polishing' would alter the
ability to ( hold ) paint.
I'd just prefer that the only 'shiny' bits back there be the
quad tips themselves....
Thanks!
- Ray
( still ) Not an exhaust system expert...

Polishing might leave a slight film of polishing compund on the surface, simply wipe with clear acetone or alchohol (isopropal or methanol, not your brew of choice :p) let it dry and then paint in several light coats allowing it to flash dry between each coat.

S.F.

I see ...
I did not know if the 'polishing' would alter the
ability to ( hold ) paint.
I'd just prefer that the only 'shiny' bits back there be the
quad tips themselves....
Thanks!
- Ray
( still ) Not an exhaust system expert...

On any polished metal surface it is still a good idea to use usual paint prep techniques. Scower the surface with a abrasive pad and then clean throughly. High temperature paints are recommended. As SF said 500 may suffice but 1200 will be better.

Wow, that is quieter than I thought it was going to be..... I like it :)

If it could be made even quieter but still flow the same I would probably get that setup instead though ;)

I can't wait for this to be available. :gears:

I am with you on that one. My daily drive is down a winding 5 mile hill and loud exhaust just brings unwanted attention.

Free flowing, stealth mode for me.

^
|
|

Me too.

if you use coupon code fordtruck8 at hottexhaust you can get the system for $575 shipped.

I got bored and googled it... coupon code ls12gto will get it down to $571. That's almost a gallon of gas... :bubbrubb:

that system sounds very very good. I wonder though how it sounds inside the cabin. It looks really good though. Tips need to be a bit bigger for my liking, but its nice. Not to loud, but not quite either.

From the feedback I am getting, it seems I may forgo the 3" system for an additional 2.5" system that will focus on keeping the DOD / AFM in check and tweak the existing offering for a little more sound. I will be looking into this some more and keeping you updated.

Any more update on this oxidizr? Has the p/n 16795 system that is being released this week (I think) been tweaked at all from the sound clips and dyno numbers you have posted? Are you still considering another 2.5" system to keep the AFM in better check? I was planning to make a purchase soon but wanted to get an idea of what other options might be coming before I do. Thanks

Neil

Anyone got theirs yet?
Oxidizr you still out there?

Neil

I would also like to know if there are any plans to make an even quieter catback that still flows well.

I would be very interested in a system that eliminates all of the inefficiencies of the stock system (i.e. varying size pipes, non-mandrel bends), but is still whisper quiet. I am guessing that what I am looking for is a modification of the 2.5" system that is prototyped here, but includes more Magnaflow straight-through mufflers, in-line.

For example, rather than the x-pipe in the protytpe 2.5" system, what I am thinking is to use the Magnaflow large-can muffler with the built-in x-pipe, which would still offer x-pipe-type scavenging. Then adding some of the Magnaflow bullet-style, straight-through mufflers, similar to those in the stock system, would keep noise down even more while optimizing efficiency.

That's my wish anyway. I would have a great-flowing, quiet system, then if I added mods down the road, I would already have an excellent flowing exhaust.

I agree! I would love to have an exhaust system that has the same performance amenities, but whisper quit. Hopefully Magnaflow will test the large-can example?

Mine maybe on it's way, at least my card was charged today.

It's $472 through Summit Racing btw gang!!!

That will piss me off if I just paid $100 more than I had to pay from hottexhuast.com .

It's $472 through Summit Racing btw gang!!!

That will piss me off if I just paid $100 more than I had to pay from hottexhuast.com .

Show's 572.95 on my computer!


http://store.summitracing.com/partdetail.asp?autofilter=1&part=MPE%2D16795&N=700+115&autoview=sku

Show's 572.95 on my computer!


http://store.summitracing.com/partdetail.asp?autofilter=1&part=MPE%2D16795&N=700+115&autoview=sku

I just went to Summit and here is my total. It certinly is no where near $472.


Part # Item Price Qty Price

--------------------------------------------------------------------------------

MPE-16795 2008 G8 EXHAUST $572.95 1 $572.95
This part is temporarily out of stock, but you can order it now. Tentative ship date: 5/31/2008.



--------------------------------------------------------------------------------

Parts Total: $572.95
Handling Charge: $11.75

Total Order: $584.70
Backorder Charges: $584.70
Total amount charged at this time: $0.00

He probably made a typo.

You are right I am sure he meant $572 not $472.

Yep, I'm a moron, its a typo, it was $572.00, sorry to get everyone excited!:slap: I did get a $30.00 off coupon from them I can use though.

Yep, I'm a moron, its a typo, it was $572.00, sorry to get everyone excited!:slap: I did get a $30.00 off coupon from them I can use though.

Thanks for the update I was getting really pissed that I spent a $100 more than I should have. Either way I can't wait to get mine. They debited my card for the money so I hope I get it soon.

Any more update on this oxidizr? Has the p/n 16795 system that is being released this week (I think) been tweaked at all from the sound clips and dyno numbers you have posted? Are you still considering another 2.5" system to keep the AFM in better check? I was planning to make a purchase soon but wanted to get an idea of what other options might be coming before I do. Thanks

Neil

The more quiet system is in final stages of development as it requires a custom configuration muffler and will be offered along side of the standard system. This system is about 30-60 days out from in stock availability.

Nice work on the system. It sounds and looks great! I also really like the fact so much information was shared. Hopefully the 2009 uses the same exhaust as this will be my first upgrade.

The more quiet system is in final stages of development as it requires a custom configuration muffler and will be offered along side of the standard system. This system is about 30-60 days out from in stock availability.

I'm looking forward to it :wink2:

The more quiet system is in final stages of development as it requires a custom configuration muffler and will be offered along side of the standard system. This system is about 30-60 days out from in stock availability.

More quiet...sounds like exactly what I want. More power, not more noise.

Keep us updated :)

The Magnaflow standard system should be making its way out to the distributor networks TODAY!

The more quiet system is in final stages of development as it requires a custom configuration muffler and will be offered along side of the standard system. This system is about 30-60 days out from in stock availability.

Do you anticipate the more quite system to give the same power gains as the standard system or is there going to be a little drop off?

Also were there any changes to the standard system before production from what you have showed us previously? Thanks

Neil

The Magnaflow standard system should be making its way out to the distributor networks TODAY!

Sweet.....ordered mine!:)

Can we use the stock tips with this system? I do not want my exhaust to sound quiet. Car already sounds like a mouse. I want it to come to life and at idle make some noise. But I dont want it to sound like a NASCAR or a dump truck.

Can we use the stock tips with this system? I do not want my exhaust to sound quiet. Car already sounds like a mouse. I want it to come to life and at idle make some noise. But I dont want it to sound like a NASCAR or a dump truck.

Stock tips are welded to the muffler pipe extension and are not "removable" ... they could however, be cut off and welded in place if that was your preference.

Can we use the stock tips with this system? I do not want my exhaust to sound quiet. Car already sounds like a mouse. I want it to come to life and at idle make some noise. But I dont want it to sound like a NASCAR or a dump truck.

The ones they use are awesome! I assume they come with the rest of the exhaust???!!!

Can we use the stock tips with this system? I do not want my exhaust to sound quiet. Car already sounds like a mouse. I want it to come to life and at idle make some noise. But I dont want it to sound like a NASCAR or a dump truck.The thing about magnaflows is that they are quiet at first(a bit louder than stock) but they get louder once you break them in after a few drives. Actually since the G8's system is so restrictive they are probably really loud right out of the box but they will get louder though after a few drives. That's how it was with my Stang and I had to explain that to a few folks who are interested in magnaflows but never went with them because they felt they were quiet. Install them, break them in, and then enjoy the sound. :)
I'm really satisfied with the magnaflows I have on my Stang.

Oh and btw after the mufflers are broken in they won't get annoying loud they just get richer in tone. If you want a bit of aggressiveness you might want to check out the Magnapacks. A member installed Magnapacks on his and posted clips somewhere.

On an interesting side-note, hottexhaust.com is based out of Canada, so with the current exchange rate the $557.69 works out to be $569.41 ...however, with the free shipping it is probably still cheaper than Summit.

On an interesting side-note, hottexhaust.com is based out of Canada, so with the current exchange rate the $557.69 works out to be $569.41 ...however, with the free shipping it is probably still cheaper than Summit.

Not if you have the current $30.00 coupon promotion!

Does Summit do free shipping? I'd imagine shipping would be $$$ on an exhaust.

Summit has "free shipping" but something like a $9.00 handling fee no matter what size the package is. On something like exhaust you are still ahead, on a roll of tape you get screwed.

No shipping, just the handling fee. It was like $550 shipped! It was real nice when the handling fee was only $4.00.

oxidizr, you have a PM. :)

I just spoke with HottExhaust. My system should be shipping either today or it went out yesterday. They are being shipped directly from Magnaflow.

Mr SandDog

I think we get the idea that your a cheap feller.

For some people that just want to alter the sound of there car than yes just replacing the mufflers is a feasible option.

For the the majority that want to pick up a couple of extra ponies and are planning on making more power out of there cars than the average consumer than there is absolutely a good reason to get upgraded mandrel bent piping.

Please keep in mind that your motor is nothing more than an air pump.

The easier and faster you can get air in and out, the more power that motor is going to make.

Thanks
Mike Haddad

Mr SandDog

I think we get the idea that your a cheap feller.

For some people that just want to alter the sound of there car than yes just replacing the mufflers is a feasible option.

For the the majority that want to pick up a couple of extra ponies and are planning on making more power out of there cars than the average consumer than there is absolutely a good reason to get upgraded mandrel bent piping.

Please keep in mind that your motor is nothing more than an air pump.

The easier and faster you can get air in and out, the more power that motor is going to make.

Thanks
Mike Haddad

I guess you're responding to a post that's over a month old? :huh:

Regardless, I would not characterize myself as cheap; however, I would say that I don't waste my money.

If you've been in motorsport for a while (and I'm guessing you have been), then you know that most people get exhausts for the sound only; they could not care less what it does/doesn't do for performance. These are the same people who say they want to get a cam and get all drooly when they say, "And I want me some lope!!!" like lope is the whole reason to get a cam.

On this topic I have to say you are right on. Magnaflow has eliminated the 2.25" (and 2.0" in places) pipe and replaced it with 2.5" througout. This alone makes it worth getting, especially when F/I is being considered. The other best part of Magnaflow is their straight-through muffler design, which allows you to optimize flow, while choosing the sound level you like best.

I had over 40" of large-body muffler in my Radixed Avalanche and loved it. Whisper quiet and LOTS of power. No exhaust noise to distract from the sound of the blower, and no baffles to get in the way of air leaving the system. If/when I get a G8, I will certainly consider Magnaflow, especially if they build a quieter version of their 2.5" system.

I think we're both on the same page here Mike. :judge:

The G8 has a V8 in it, I want it to sound like a muscle car. Start it up, here some rumblin at idle, pull away and hear a little, WOT have it come to life. Right now, its silent at idle, barely something pulling away, exhaust note at WOT. If I buy an exhaust, its cause I want it to sound like a V8, not a 4 cylinder Honda Civic.

The G8 has a V8 in it, I want it to sound like a muscle car. Start it up, here some rumblin at idle, pull away and hear a little, WOT have it come to life. Right now, its silent at idle, barely something pulling away, exhaust note at WOT. If I buy an exhaust, its cause I want it to sound like a V8, not a 4 cylinder Honda Civic.

The G8 does an adequate job at keeping exterior sounds out of the cabin so the amount of ehxuast feedback heard inside with the windows up is disproportionate to the increase in sound outside. We have some sound clips but I still cant stress enough just how much I hate judging exhaust by recordings streamed on the internet. It just doesnt do it justice.

The entire first batch of the standard systems should be shipped and the more quiet system will release along with our performance Catalyst pipes (off-road of course) in the next month. If you can find someone local its best to hear with your own ears. As it appears there should be 75 G8s getting MAGNAFLOW cat-backs this month alone and as it seems, more to follow.

Sorry I didn't read through the entire post - but I had a general question about the interior noise of these systems. I currently have an 01 Camaro SS w/ a Magnaflow catback, and I love it. But the system is loud (inside and out of the car) to say the least. I have no problem with this and prefer it that way however the G8 is the wife's car. She doesn't like loud, but this car needs a little more rumble to it than the stock restrictive exhausts bellows out. Is this system at a manageable audio level inside the car?

Sorry I didn't read through the entire post - but I had a general question about the interior noise of these systems. I currently have an 01 Camaro SS w/ a Magnaflow catback, and I love it. But the system is loud (inside and out of the car) to say the least. I have no problem with this and prefer it that way however the G8 is the wife's car. She doesn't like loud, but this car needs a little more rumble to it than the stock restrictive exhausts bellows out. Is this system at a manageable audio level inside the car?

Post 52 gives hard numbers on the interior and exterior noise.
http://www.g8board.com/forums/showpost.php?p=34918&postcount=52

Neil

Post 52 gives hard numbers on the interior and exterior noise.
http://www.g8board.com/forums/showpost.php?p=34918&postcount=52

Neil

Awesome - it is much louder on the exterior, but not that much more interior noise. Nicely done Magnaflow.

I ordered mine already, still on back orders though!

Anyone get their's or get a tracking number yet?

Anyone get their's or get a tracking number yet?

My system shipped yesterday out of Ca.!!!!


w00t!

Mine was waiting for me on the front porch this afternoon (I live in California). I plan on installing it this Friday.

:driving:

Yep, I just got an email earlier today, mine will be here on Monday.