*Edited while sponsorship is pending*


S.F.

Where you located??

I think DFW is Dallas Ft Worth (Texas)

I think DFW is Dallas Ft Worth (Texas)


Correct. My appologies, I should have clarified.

S.F.

Thats correct! In consideration for allowing me to use your G8 to design the jigs I need for building the H-Pipes/axlebacks I will give the G8 owner the prototypes for free.

Since this is a new board with no history feel free to check me out on www.ls2gto.com

Ive been building this stuff for quite a while...........

Thanks!

S.F.
What diameter pipe you gonna use SF ? 3" is big over here on the VE's....

I have a full system with twin 3" stainless steel catback. Happy to post pics if you would like.

Ahh.. if I was just a few thousand miles closer lol.

What diameter pipe you gonna use SF ? 3" is big over here on the VE's....

I have a full system with twin 3" stainless steel catback. Happy to post pics if you would like.

Having not seen the OEM system yet, I can only speculate but I am sure its 2.5" piping. My products are meant to be installed in place of the stock components so pipe size must match.

I have built a few 3" H-pipe's for GTO owners who were installing a custom 3" system.

Too bad you guys are half a world away! Otherwise I'd just have someone ship me the stock VE system for prototyping............

S.F.

Having not seen the OEM system yet, I can only speculate but I am sure its 2.5" piping. My products are meant to be installed in place of the stock components so pipe size must match.

I have built a few 3" H-pipe's for GTO owners who were installing a custom 3" system.

Too bad you guys are half a world away! Otherwise I'd just have someone ship me the stock VE system for prototyping............

S.F.
The OEM system is a hodge podge of pipes from 2 to 2 1/4" pipes.

I am happy to find an OEM system for you and arrange packaging up etc if you want to pay the freight costs. I assume you just want the catback portion of the exhaust, or do you want the headers and cats too ? Exhaust shops are throwing them away by the hundreds here.

JK

The OEM system is a hodge podge of pipes from 2 to 2 1/4" pipes.

I am happy to find an OEM system for you and arrange packaging up etc if you want to pay the freight costs. I assume you just want the catback portion of the exhaust, or do you want the headers and cats too ? Exhaust shops are throwing them away by the hundreds here.

JK


Is the LHS Rack and Pinion Steering location going to influence the header -engine pipe arrangement.

Mike

Is the LHS Rack and Pinion Steering location going to influence the header -engine pipe arrangement.

Mike
KPM Motorsport in South Australia have a set of headers available for the LH drive G8 version...

Exhaust shops are throwing them away by the hundreds here.

JK


I find that statement both funny & sad...
Coming from the Corvette world -
where many, many drivers do aftermarket exhaust systems...

KPM Motorsport in South Australia have a set of headers available for the LH drive G8 version...

They're not longtubes :(

Im in DFW, but not sure yet on immediate purchase.

Im in DFW, but not sure yet on immediate purchase.


If you decide to pull the trigger, please let me know.


Thanks!

S.F.

I could be down for this........

Ready to get started, who's going to be the prototype car??????

S.F.

bumpo

There are 2 threads devoted to this?

There are 2 threads devoted to this?


One thread was old so I didnt realize they were in the same forum when I created the new one. This is a new board for a new car that I am trying to develop products for. Maximum exposure is what is required here....

My work can be found everywhere here: www.ls2gto.com under the same screen name. Please feel free to check me out and see that this is an honest effort and I am not a "spammer"

If I offended anyone by posting doubles, my apollogies.

S.F.

Im going to the dealership later this week to check out one I have a deposit on. ;) How long do you think you would take (because I would have to get a rental! )?

Im going to the dealership later this week to check out one I have a deposit on. ;) How long do you think you would take (because I would have to get a rental! )?

I took me an entire day to build the jigs for the GTO so I think it would be similar. The best course of action would be to do as much work as could be done on Saturday, and if we dont get finished with the jigs we'd complete them the following day or another weekend.

I wouldnt want you having to pay for a rental or be without your new car. You could then be driving your car while I build the new axlebacks/H-pipe. Once they are done, you could come back for the install or I'll ship them to you.

S.F.

Wish I lived closer to DFW area... Little far to drive from Houston.

Wish I lived closer to DFW area... Little far to drive from Houston.

Well if you figure a setup like that may cost about $400 + and you'd only spend about $100 in gas!!

If I end up getting one in the DFW area I'll definitely give you a shout. Waiting for the local dealer to get theirs in so my woman can test it out. After that I'll be full force on the move to buy one, since I already have all the bank's papers filled out!

Guys, I've got SF's H-pipe (actually I bought his personal modified "catback" off of him when he got bored with it), and I'll vouch for his reputation. He's THE guy to go to for an H-pipe on the GTO, and his axlebacks are pretty popular too. He's a great guy to work with and his pricing (once he builds them) will be very fair I'm sure. If you want to modify your exhaust on your G8, this is the perfect opportunity, I'd take him up on it!

I'm new to most the GM stuff, is this for sound or do you gain power as well?

I'm new to most the GM stuff, is this for sound or do you gain power as well?

Mostly sound however the G8 exhaust is heavily muffled and is only sized at 2.25" so any increases in flow should make bigger power increases than on the GTO.


Oh, thanks for the kind words "Snooks"!!!

S.F.

Is this offer still on the table? It's extremely tempting to make the 3 1/2 hour drive.

hey now, i find out this week. hold on! :D J/k, more power to you if you decide to jump on this.

Is this offer still on the table? It's extremely tempting to make the 3 1/2 hour drive.

Yes it is. Be advised that the process of building the jigs may be more than whats possible in one day.

S.F.

Here are some pics of an Axleback set (05-06 GTO) I'm currently building.

http://i152.photobucket.com/albums/s190/angelajeanmessina/axleback004.jpg

http://i152.photobucket.com/albums/s190/angelajeanmessina/axleback003.jpg

http://i152.photobucket.com/albums/s190/angelajeanmessina/axleback002.jpg

http://i152.photobucket.com/albums/s190/angelajeanmessina/axleback001.jpg

S.F.

Does the H-Pipe replace the big fat factory resonator? Why is that resonator there and what does your H-Pipe do differently? If nothing else, it should weigh less. :-)
Do all your axle backs use Magnaflow mufflers? Is there any way to describe in words how loud the Magnaflow will be on the G8 and what the tone would sound like? Any chance of the dreaded "drone" at highway speeds after installing your product on a G8? Maybe you don't know the answers yet since you have not had the chance to install on a G8 GT.

If you are able to build a jig within a day, I will be at your shop tomorrow before 4pm.

If not, I'll let someone closer have this deal. I can hang around for a while, but any longer than a day, I'll have to pass..

I got a local exhaust guy who'll do anything I want for free, just have to pay parts.

If you are able to build a jig within a day, I will be at your shop tomorrow before 4pm.

If not, I'll let someone closer have this deal. I can hang around for a while, but any longer than a day, I'll have to pass..

I got a local exhaust guy who'll do anything I want for free, just have to pay parts.


I' think we'd be cutting it close and since you live quite a way from me it probably would be be best to try and find a local car.

I do however have another idea. What If I were to provide the parts (Mufflers, tips and flanges) for your exhaust guy to build your new setup from scratch on the car in exchange for the stock axleback assemblies. This way your still getting stuff for free and I can then have plenty of time with the stock axlebacks to reverse engineer them and build the jigs.

S.F.

Does the H-Pipe replace the big fat factory resonator? Why is that resonator there and what does your H-Pipe do differently? If nothing else, it should weigh less. :-)
Do all your axle backs use Magnaflow mufflers? Is there any way to describe in words how loud the Magnaflow will be on the G8 and what the tone would sound like? Any chance of the dreaded "drone" at highway speeds after installing your product on a G8? Maybe you don't know the answers yet since you have not had the chance to install on a G8 GT.

The H-Pipe would replace the "big fat factory resonator" for the G8. See the following for the GTO H-pipe install pics:

http://ls1gto.com/forums/showthread.php?t=108920&highlight=StolenFox

http://ls1gto.com/forums/showpost.php?p=1928732&postcount=132

In refference to drone: I have yet to see a Magnaflow equipped GTO (same basic engine/exhaust layout) with a 6" round or 4x9 oval muffler exhibit any drone.

Now, as mods increase (longtubes, high flow cats, cams) so does the sound volume.

I prefer the Magnaflows due to the straight through design, stainless contruction and the deep controlled sound they produce.

S.F.

I' think we'd be cutting it close and since you live quite a way from me it probably would be be best to try and find a local car.

I do however have another idea. What If I were to provide the parts (Mufflers, tips and flanges) for your exhaust guy to build your new setup from scratch on the car in exchange for the stock axleback assemblies. This way your still getting stuff for free and I can then have plenty of time with the stock axlebacks to reverse engineer them and build the jigs.

S.F.


PM Sent

SF Nice to see your branching out. If the G8 were available at GMS pricing I woulda bought one to go along with the GTO and I'd be in line waiting for the axle back and H-pipe. BTW, the axle back straight pipes are INSANELY loud with LT's, no CATS or Res. Would an H pipe quite it down or just change the tone?

Sewell still hasnt received their most recent shipment. :censored:

Out of respect for the owner of this board and the rules for site sponsorship anyone who is interested in the G8 exhaust products needs to PM me directly. I will begin posting openly about these products after Ive been in contact with DY.

S.F.

Hopefully you'll get something together soon - my can is too quiet! BTW, nice avatar on the GTO site ;)

As soon as someone removes the stock system I would like to see what the inside of the stock mufflers and resonators looks like.

Out of respect for the owner of this board and the rules for site sponsorship anyone who is interested in the G8 exhaust products needs to PM me directly. I will begin posting openly about these products after Ive been in contact with DY.

S.F.

Ryan, check your Mailbox. Let's do this!

Looks like I need another development vehicle. If anyone is interested in free axlebacks for their G8, PM me.


S.F.

Looks like I need another development vehicle. If anyone is interested in free axlebacks for their G8, PM me.


S.F.

:confused:

Just received your reply that they should work. Two PM's sent to you. I thought we were still on and had not intentions on canning the deal if it was going to work.

I went with 2 chamber flows.....nice deep sound...no resonating

:confused:

Just received your reply that they should work. Two PM's sent to you. I thought we were still on and had not intentions on canning the deal if it was going to work.

I'm sorry, I just read and replied to your PM's. Were still on if your comfortable with what I proposed. My appologies for the confusion!

I went with 2 chamber flows.....nice deep sound...no resonating

Post some pics of the work please! Id like to see your shops approach to the layout.

S.F.

Reply sent back

Just wanted to show you all how the G8 project is progressing. Nothing is available for sale until the parts have been field tested and the site sponsorship is secured. Just a little tease........

http://i152.photobucket.com/albums/s190/angelajeanmessina/G8pics014.jpg

http://i152.photobucket.com/albums/s190/angelajeanmessina/G8pics015.jpg

http://i152.photobucket.com/albums/s190/angelajeanmessina/G8pics016.jpg

The H-pipe needs its ends flared and then its on its way to "gbcop" for testing in conjunction with his new Magnaflow axlebacks.

Stay tuned...........

S.F.

Just wanted to show you all how the G8 project is progressing. Nothing is available for sale until the parts have been field tested and the site sponsorship is secured. Just a little tease........







The H-pipe needs its ends flared and then its on its way to "gbcop" for testing in conjunction with his new Magnaflow axlebacks.

Stay tuned...........

S.F.

You're a dick! :rant:

LOL:p

Keep us posted! I have money in hand and car on order...:gears:

You're a dick! :rant:

LOL:p

Keep us posted! I have money in hand and car on order...:gears:

Ouch! I'm moving as fast as I can, LOL!

S.F.

Please tell us how an H-pipe such as this would benefit a user.

Please hurry! I can't wait. LOL :gears:

what diameter pipe will you use?

and do you will you offer different diameters?

thanks

what diameter pipe will you use?

and do you will you offer different diameters?

thanks


The stock system uses 2.25" pipe that is flared to fit a 2.5" I.D. size flange. The fact that they use 2.5" flanges on a 2.25" system is hepful because it allows me to use 2.5" flanges, bends and tips on my axlebacks.

Thanks for the opportunity to clarify.

S.F.

Please tell us how an H-pipe such as this would benefit a user.


An "H-pipe" or "X-Pipe" is device used to equalize exhaust pulse pressure across both pipes in a dual exhaust system. This allows each pressure wave to travel through both sides of the exhaust system. Scavenging (the evacuation of exhaust gases from the cylinder) is improved because the crossover has the effect of allowing the exhaust pulses to "pull" the pulse immediately after it in the opposing cylinder bank. The G8 and its older brother the GTO had in essence a "true dual" exhaust in that the two exhaust pipes are not connected in terms of exhaust gas flow.

This "true dual" system is not as efficient at scavenging exhaust at higher RPM's and as such is not able to produce as much power in comparison to a system equipped with a crossover. This is not to say that installing an "H" or "X" in your exhaust is going to make huge power gains, rather it will work in conjuntion with things like perf. cams or forced induction that much more effectively.

The other issue created by a "true dual" system is one of sound tone and volume. When you amplify the sound volume from a "true dual" system by replacing its quiet and restrictive stock mufflers with more aggresive performance version, the unrefined and more objectionable sound frequencies become much more noticeable. I call it the old "farm truck" sound as it reminds me of some beat up old pick up with glasspacks. Those who have replaced their dual-in / dual-out resonators (which do not allow for exhaust gas mixing as they are seperate chambers)with straight pipes instead of an "H" or "X" (05-06 GTO's as well as a couple G8 owners) have increased that type of sound volume by in effect removing yet another muffler from the system.

Sound type is a personal thing and many people are very partial to one setup vs. another. Some like straight pipes and the raw sound they produce, others prefer the deep rumble produced by an H-pipe and some love the higher pitched scream that an X-pipe helps to produce.

Bottom line is you go with what sounds good to you. H-pipes = more low bass "old school" rumble. X-pipe = higher pitched roar that is more 'modern" sounding. Both are superior to straight pipes for power production and sound tone control.


S.F.

nicely put....

Thanks StolenFox, I was wondering the difference between the two. Based on your explanation, I think I'll like the sound of the H-pipe more. Hmmm, wonder if YouTube has any comparison vids. :)

Ouch! I'm moving as fast as I can, LOL!

S.F.


Oh great & powerful G8 GT exhaust guru, sir:

Do you intend \ expect to sell 'just' an
"axle-back" system - meaning just a replacement for those
rear mufflers?
Without also having to buy the H-pipe as well?

My sense is that - for me - just replacing
the rear mufflers with freer flowing units,
that allow a bit of the V8 sound
will be enough for me....

And:
Will keeping the stock center resonator eliminate any
chance of drone?

Thanks,
- Ray
Hoping for just an axle-back, some time soon after purchase . . .

Oh great & powerful G8 GT exhaust guru, sir:

Do you intend \ expect to sell 'just' an
"axle-back" system - meaning just a replacement for those
rear mufflers?
Without also having to buy the H-pipe as well?

My sense is that - for me - just replacing
the rear mufflers with freer flowing units,
that allow a bit of the V8 sound
will be enough for me....

And:
Will keeping the stock center resonator eliminate any
chance of drone?

Thanks,
- Ray
Hoping for just an axle-back, some time soon after purchase . . .

Ray,

The Axlebacks and H-pipes will be sold seperately as one is a bolt on product that can be done in your driveway (axlebacks) and the other must be welded in (h-pipe). In regards to drone: Just about every one of the 450+ 05-06 GTO owners that replaced their resonator with one of my H-pipes has reported a reduction in interior drone. We have come to the conclusion that since there is no resonator for the exhaust to "resonate in" in conjunction with the balancing of the exhaust provided by the h-pipe or x-pipe is what helps squash the drone.

Drone is most drastically affected by the type of muffler and its location within the exhaust system.

S.F.

Ray,

The Axlebacks and H-pipes will be sold seperately as one is a bolt on product that can be done in your driveway (axlebacks) and the other must be welded in (h-pipe). In regards to drone: Just about every one of the 450+ 05-06 GTO owners that replaced their resonator with one of my H-pipes has reported a reduction in interior drone. We have come to the conclusion that since there is no resonator for the exhaust to "resonate in" in conjunction with the balancing of the exhaust provided by the h-pipe or x-pipe is what helps squash the drone.

Drone is most drastically affected by the type of muffler and its location within the exhaust system.

S.F.


Hmmm . . .

My experience with my C6 Corvette ( stock = WAY to quit for me ) was that the drone induced by the aftermarket mufflers was reduced substantially when I replaced the stock H-pipe ( with no resonator(s) ) with an H-pipe from Corsa that included 2 resonators.

Anyway – glad you are working on this system. . .
- Ray
NOT an exhaust system guru & don’t even play one on TV . . .

Hmmm . . .

My experience with my C6 Corvette ( stock = WAY to quit for me ) was that the drone induced by the aftermarket mufflers was reduced substantially when I replaced the stock H-pipe ( with no resonator(s) ) with an H-pipe from Corsa that included 2 resonators.

Anyway – glad you are working on this system. . .
- Ray
NOT an exhaust system guru & don’t even play one on TV . . .

You changed your Corsa system from a "sport" to "touring" by adding the resonators. Odd that you experience a drone given Corsa's hailed "RSC" technology that is supposed to kill all drone......

That is assuming of course that you were running the Corsa mufflers.

S.F.

You changed your Corsa system from a "sport" to "touring" by adding the resonators. Odd that you experience a drone given Corsa's hailed "RSC" technology that is supposed to kill all drone......

That is assuming of course that you were running the Corsa mufflers.

S.F.

I had the Flowmaster American Thunder rear mufflers \ axle-backs installed.
Part #: 17427.
Went from way too quiet – to way too loud.

http://www.flowmastermufflers.com/products/index.php?main_page=product_info&products_id=4080

And a healthy dose of drone – all over the RPM range.
BTW: I bought mine for only $375 – I see that they have raised their price since, but A LOT!

http://www.corsaperf.com/c6.htm


My Corvette has the 6L80 \ A6 trans. – same designation as the G8 GT’s –
though in the Corvette the trans. is mounted in the rear, just in front of the final drive unit.

The Corsa Sport system for the C6 A6 ( low on the page at the URL above ) actually has 2 resonators. The Touring for the A6 has yet another set of resonators – that mount just behind the cats.

- Ray
Wasted too much time on finding a C6 exhaust I could enjoy & live with . . .

I had the Flowmaster American Thunder rear mufflers \ axle-backs installed.
Part #: 17427.
Went from way too quiet – to way too loud.

http://www.flowmastermufflers.com/products/index.php?main_page=product_info&products_id=4080

And a healthy dose of drone – all over the RPM range.
BTW: I bought mine for only $375 – I see that they have raised their price since, but A LOT!

http://www.corsaperf.com/c6.htm


My Corvette has the 6L80 \ A6 trans. – same designation as the G8 GT’s –
though in the Corvette the trans. is mounted in the rear, just in front of the final drive unit.

The Corsa Sport system for the C6 A6 ( low on the page at the URL above ) actually has 2 resonators. The Touring for the A6 has yet another set of resonators – that mount just behind the cats.

- Ray
Wasted too much time on finding a C6 exhaust I could enjoy & live with . . .


I see. I had a feeling another type of muffler was in use. I like Flows for certain applications but they are very prone to the drone......

S.F.

I see. I had a feeling another type of muffler was in use. I like Flows for certain applications but they are very prone to the drone......

S.F.

Did I read earlier that you are using Magnaflow mufflers?
Do you have to weld on those dual tips?
Are the tips the same size & thickness as the stock ones?
Thanks,
- Ray
Very interested to see these on a vehicle . . .

Did I read earlier that you are using Magnaflow mufflers?
Do you have to weld on those dual tips?
Are the tips the same size & thickness as the stock ones?
Thanks,
- Ray
Very interested to see these on a vehicle . . .

Check out the postings by "gbcop" as he's running the mufflers and tips I will be using. Stock tips will only be available on a very limited basis.

S.F.

Here's the S.F. exhaust prototype on my car.

Here's the S.F. exhaust prototype on my car.

I had seen those, thanks.
I want to see how the dual tips ( per muffler )
as shown in the jig look on the car...
[ edit ]
Those in the jig do not look stock
& do not look like the ovals on your car??
( confused )
Thanks,
- Ray
So patient......

I had seen those, thanks.
I want to see how the dual tips ( per muffler )
as shown in the jig look on the car...
[ edit ]
Those in the jig do not look stock
& do not look like the ovals on your car??
( confused )
Thanks,
- Ray
So patient......

The tips, muffler, piping that is shown in the jig are in fact OEM as they are the stock axlebacks of "gbcop"s G8 that I am using to build the jigs.

Aftermarket dual round tips are not an option at the moment. They are all far too long.

S.F.

The tips, muffler, piping that is shown in the jig are in fact OEM as they are the stock axlebacks of "gbcop"s G8 that I am using to build the jigs.

Aftermarket dual round tips are not an option at the moment. They are all far too long.

S.F.


Wow.
Everything I had previously seen ( photos & a diagram ) indicated that the stock system muffler was 1 in & 2 out.
The picture you posted of the one in the jig looked to me like 1 in 1 out
- and then a 1 into 2 tip.
Odd.
I’ll have to re-check.
- Ray
Sorry – apparently I was REALLY confused . . .

No worries. I should have the jig finished up this weekend.


Stay Tuned..........

S.F.

UPDATE:

The axleback jig is finished! The position of the hangers has presented a minor challenge that will change the design slightly but were still on track.

I hope to have the prototype set under construction this weekend.

S.F.

Sweet... can wait to see the results...

will you be using magna.... or will we even have choice of which brand we want?

Thanks