Guys I need your help to advice me what headers will be best to install after installing Magnaflow cat-bak ?

As we can gain almost the same HP from headers so why don't we use it :wink2:

Guys I need your help to advice me what headers will be best to install after installing Magnaflow cat-bak ?

As we can gain almost the same HP from headers so why don't we use it :wink2:

Right now, there are no headers that will mate up with the MF cat-back.

In fact, there are on American Racing Headers header and pipe package and the MF cat-back for exhaust choices.

Right now the only option for headers and keeping the Magnaflow cat back exhaust are the JBA shorty headers (http://www.jbaheaders.com/feature_pages/08G8.asp) which are just being released. There are always questions on how much gains you get from shorty headers. If you were going to go that direction I would also plan on getting the Magnaflow high flow cats (http://www.g8board.com/forums/showpost.php?p=62413&postcount=144)that they are about to release as I believe that some of the restriction in the G8 exhaust system is in that bend into the stock cat. Kooks is also working on a long tube set-up but my guess is that it will be similar to the ARH system that will incude most of the exhaust back to the mufflers.

Neil
'08 MGM G8 GT

I think the JBAs will be good. As long as they straighten out the cat pipe.I have seen the shorties. They appear to be equal length. If the cat came strait off the bottom and then into the pipe I cant see them not making at least 20hp for probably 1/3 the price.

I wish there was a definite and straight answer to whether or not these are street legal. All I've gotten is maybe you will pass inspection if they don't check this or they don't do that or if they let this slide.

I wish there was a definite and straight answer to whether or not these are street legal. All I've gotten is maybe you will pass inspection if they don't check this or they don't do that or if they let this slide.

They are 100% not emissions legal. If the cat is moved more then 3 inches it is illegal. However, our cars usually get a visual and plug up to the obd2 conn. If there is no light and all readiness monitors have passed, you get a sticker... In most states. The JBAs shorties/equal length will be because they will not move the. They shouls have a 50 state legal status also.

They are 100% not emissions legal. If the cat is moved more then 3 inches it is illegal. However, our cars usually get a visual and plug up to the obd2 conn. If there is no light and all readiness monitors have passed, you get a sticker... In most states. The JBAs shorties/equal length will be because they will not move the. They shouls have a 50 state legal status also.

So basically I will fail inspection here in NY. Any plan's for legal headers with the same or similar gains? Is that even possible?

Legal 1s should pick up 20hp rwhp for 1/3 the price

ah that sucks. that's about half the gain isn't it? What is the difference between the two anyway aside from moving the cats? The off road one doesn't filter emissions?

1 is a long tube and 1 is a shorty header. They both filter emissions the same way. The long tubes move the cat making them non-emissions compliant

1 is a long tube and 1 is a shorty header. They both filter emissions the same way. The long tubes move the cat making them non-emissions compliant

how does that double power output over the legal one?

Long tubes in almost every case make more power. But for a 1/3 of the price u can get over 1k in more bolt ons:driving:

The only think I know of that is going to be fully compatible with any after market exhaust system is going to be the JBA shorties.

They will be 100% 50 state smog legal.
Please note that in order to remain smog legal some states (California) mandate that your are not allowed to alter the stock location of the catalytic converters.
So you are still going to be stuck with that awkward bend coming into the cats.

We will be the first to have these units in stock. As soon as they become available we will let everyone know.

JBA will also be offering long tubes and possibly mid tubes to follow.

Thanks
Mike Haddad

The only think I know of that is going to be fully compatible with any after market exhaust system is going to be the JBA shorties.

They will be 100% 50 state smog legal.
Please note that in order to remain smog legal some states (California) mandate that your are not allowed to alter the stock location of the catalytic converters.
So you are still going to be stuck with that awkward bend coming into the cats.

We will be the first to have these units in stock. As soon as they become available we will let everyone know.

JBA will also be offering long tubes and possibly mid tubes to follow.

Thanks
Mike Haddad

Parts are on the way ....
http://www.magnaflow.com/richard/08PontiacG8GT/G8%20cat%20OEM%20vs%20perf.JPG

More details here:
http://www.g8board.com/forums/showpost.php?p=62413&postcount=144

As it sits, I am seeing about 90-110 CFM increases over the stock units with the 250 cell metallic cats (I am playing with the inlet neck angles and pipe diameter.) I am also testing 100 cell metallic cats but seeing little or no gains with the same design. The pipe diameter and not the cell density becomes the restrictor.

ARH has the long tubes shipped out, I'll repost after the install tomorrow. They by far look to be the premier headers. The fit and finish look outstanding, but I'll make sure to post up detailed install pics and dyno runs after. The great thing is they will fit directly to my flowmaster 40 mufflers, so the G8 should really sound impressive. The whine of the charger, and the rumble of the exhaust should really turn some heads.

JBA has long tubes and shorty's. I've seen the long tubes for $799. So. with the magnaflow still cheaper than the ARH.

JBA has long tubes and shorty's. I've seen the long tubes for $799. So. with the magnaflow still cheaper than the ARH.


Redrocket, You really aren't comparing apples to apples. Like I said in a previous post, when you see a large discrepency in price there's usually a real good reason for it. Start by asking where the headers in question are manufactured.

Nick

For those thinking about the ARH's we at MAGANFLOW should have a complimentry part very soon.

Prototype Axle-back on vehicle:
http://www.magnaflow.com/richard/08PontiacG8GT/G8%20A-B.JPG

Some other data regarding this is available here:
http://www.g8board.com/forums/showpost.php?p=62413&postcount=144

I'll be looking forward to seeing pricing on the Maganaflow axle backs. I'm not happy with the ones I had done.

Redrocket, You really aren't comparing apples to apples. Like I said in a previous post, when you see a large discrepency in price there's usually a real good reason for it. Start by asking where the headers in question are manufactured.

Nick
The descrepancy in price is partly because the don't come with the tubing from the headers to the muffler. That is just the headers. And JBA is a pretty well known exhaust producer so I doubt quality will be an issue. Just saying there is other options if you already have a cat-back system.

Well thats whats great about America we all will benefit from competition and different brands of header manufacturers. This will surely drop prices, and the G8 community will benefit.

For those thinking about the ARH's we at MAGANFLOW should have a complimentry part very soon.

Prototype Axle-back on vehicle:
http://www.magnaflow.com/richard/08PontiacG8GT/G8%20A-B.JPG

Some other data regarding this is available here:
http://www.g8board.com/forums/showpost.php?p=62413&postcount=144

I wondered how long Magnaflow was going to watch people build axlebacks before getting involved........

ARH's system in conjunction with a set of Axlebacks should be just the ticket, nice work!


S.F.

I wondered how long Magnaflow was going to watch people build axlebacks before getting involved........

ARH's system in conjunction with a set of Axlebacks should be just the ticket, nice work!


S.F.

Held out as long as I could ... gives some of our universal products time for sales in the hands of entrepreneurs willing to make some custom parts :wink2:

I wondered how long Magnaflow was going to watch people build axlebacks before getting involved........

ARH's system in conjunction with a set of Axlebacks should be just the ticket, nice work!


S.F.


I would have to agree this looks to be the hot set up. I just wonder if there will be any drone with it when the afm kicks in. If not, and I could find a way around the smog issues (CA) I think I'm gonna have to pull the card out.

Can't wait to hear clips of the AR set up with the Magnaflows. Fox, why did you stop making your axle backs (got a heads up on Magnaflow doing it?) Will you be doing any more with other brands?

I would love to see some mufflers compatible with the ARHs. I would snatch em both up in a heartbeat

I'm going to snatch those up just because I have a lease vehicle!

I would have to agree this looks to be the hot set up. I just wonder if there will be any drone with it when the afm kicks in. If not, and I could find a way around the smog issues (CA) I think I'm gonna have to pull the card out.

Can't wait to hear clips of the AR set up with the Magnaflows. Fox, why did you stop making your axle backs (got a heads up on Magnaflow doing it?) Will you be doing any more with other brands?


No, I had no prior knowledge (Magnaflow doesn't announce when they are going to be your direct competitor) and it would not have deterred me anyhow. Many different mufflers can be used in an axleback product and many car enthusiasts prefer to help support one of there own rather than a large company. Magnaflow makes an excellent product and so did I, we would be sharing this market if I had not decided to "retire".

I stopped because after 2 years, 500 h-pipes, 75 axlebacks and 100 custom one off's I simply grew tired of working on exhaust every spare minute I had. My wife and son were beginning to forget who I was!

Someone will be picking up where I left off with ALL my products in the very near future.;)


S.F.

Looking forward to that post!

No, I had no prior knowledge (Magnaflow doesn't announce when they are going to be your direct competitor) and it would not have deterred me anyhow. Many different mufflers can be used in an axleback product and many car enthusiasts prefer to help support one of there own rather than a large company. Magnaflow makes an excellent product and so did I, we would be sharing this market if I had not decided to "retire".

I stopped because after 2 years, 500 h-pipes, 75 axlebacks and 100 custom one off's I simply grew tired of working on exhaust every spare minute I had. My wife and son were beginning to forget who I was!

Someone will be picking up where I left off with ALL my products in the very near future.;)


S.F.

We encourage use of our products and sell many of our components for use in other companies custom applications sold side by side along our own offerings. In the end its great for the consumer who just has that many more options and people like SF still have a place in this market. SF has always made great products from back in the GTO days and continued to do so in his G8 products.

We encourage use of our products and sell many of our components for use in other companies custom applications sold side by side along our own offerings. In the end its great for the consumer who just has that many more options and people like SF still have a place in this market. SF has always made great products from back in the GTO days and continued to do so in his G8 products.


Thanks Richard, thats very kind of you to say! Good luck with all the products that your developing. With the G8 GXP, Challenger, Camaro etc... I'm sure your going to be very busy!

S.F.

Shorties make some power simply by flowing better. LT's on the other hand make power by scavanging. That means they create a vacum in the system, and suck the exhaust right out the cylinder head. The obviously helps your engine breathe alot. Even though shorty headers are 50 state legal..the cats sould with them may not be. Meaning to be truly 50 state legal, you would have to run a shorty with the factory cat..which does not net much gain..maybe 10HP.

My opinion on shorties has always been...they are great if you need to be 50 state legal..especially in CA. However the other excuses for them like "they are easier to install", or "they cost less" make no sense. Flip flops are cheaper and easier to "install"..but in the end, they are still a half solution with compromises.

I personally wouldn't bother with shorties. they will be worth about 10hp TOPS

LT's are far superior on LSX based motors and well worth the money. My advice to anyone wanting headers is to wait until there are multiple LT's on the market. prices will plummit.

I had originally had shorties on my camaro and then went to a 1 3/4 LT and then a 1 7/8. shorties were near worthless.

I personally wouldn't bother with shorties. they will be worth about 10hp TOPS

LT's are far superior on LSX based motors and well worth the money. My advice to anyone wanting headers is to wait until there are multiple LT's on the market. prices will plummit.

I had originally had shorties on my camaro and then went to a 1 3/4 LT and then a 1 7/8. shorties were near worthless.


383SS, Your analogy on shorties is accurate. Your statement regarding price really isn't. If you said that cheaper systems will be made mainly because they don't use the same quality materials and workmanship or maybe because they're made in China, then I'd agree. ARH prices can't plummet and are what they are for reasons being discussed here almost everyday. Like I said in a previous post, if you see a similar system to ours that's cheaper you can bet your last dollar there's a very good reason for it. That goes for everything we manufacture.

Nick

Nick

383SS, Your analogy on shorties is accurate. Your statement regarding price really isn't. If you said that cheaper systems will be made mainly because they don't use the same quality materials and workmanship or maybe because they're made in China, then I'd agree. ARH prices can't plummet and are what they are for reasons being discussed here almost everyday. Like I said in a previous post, if you see a similar system to ours that's cheaper you can bet your last dollar there's a very good reason for it. That goes for everything we manufacture.

Nick

Nick

point taken. I guess I should have said that as more and more headers are on the market, they willl get cheaper and cheaper. The last guys to market are usually the lower quality cheapos. I'm sure if pacesetter gets a set out they will be sub $500 without cats or Y.

You certainly have a great looking setup and it looks top notch.

when/if i get the gxp, i would be looking for something to mate up to a Corsa or SLP catback that's catless and LT design...

the shorties should be better than the gto one because now they advertise a 1 3/4 inch tube instead of 1 5/8. hopefully that will give more power.