Here is my Exhaust Clip form my GTP - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-28-2004, 11:20 AM   #11
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Quote:
Originally Posted by 94Regal
That car, even in the winter time with all the slipping and Traction Control action, andf that RESTRICTIVE pos airbox, and it still scares me how hard it pulls.

I suggested he get magnaflow f-body muffler. Anyone elses opinion? Its not so much about loud or tone, but I know in spring he is prob gonna get a 3.4" pulley, and NGK plugs, with our custom intake so, exhaust is the best way to combat knock also.
That is why I just bought teh k&N conical filter. Looks like your gonna have to get your hands dirty.
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Old 01-28-2004, 12:07 PM   #12
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Quote:
Originally Posted by bonnytrek
Stock mufflers, cherrybomb=resonator.
Stock mufflers are the way to go. Not too loud and still sounding sweet.
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Old 01-28-2004, 01:13 PM   #13
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I dunno, it sounds a bit canned to me. A good performance muffler will really wake up the performance and sound. More rumbly and throaty is my preference.
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Old 01-28-2004, 01:40 PM   #14
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Quote:
Originally Posted by 94Regal
That car, even in the winter time with all the slipping and Traction Control action, andf that RESTRICTIVE pos airbox, and it still scares me how hard it pulls.

I suggested he get magnaflow f-body muffler. Anyone elses opinion? Its not so much about loud or tone, but I know in spring he is prob gonna get a 3.4" pulley, and NGK plugs, with our custom intake so, exhaust is the best way to combat knock also.
I dont know if GTPs can use the f body... they have a true dual setup...
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Old 01-28-2004, 02:03 PM   #15
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Quote:
Originally Posted by 97NAbonneville1
Quote:
Originally Posted by 94Regal
That car, even in the winter time with all the slipping and Traction Control action, andf that RESTRICTIVE pos airbox, and it still scares me how hard it pulls.

I suggested he get magnaflow f-body muffler. Anyone elses opinion? Its not so much about loud or tone, but I know in spring he is prob gonna get a 3.4" pulley, and NGK plugs, with our custom intake so, exhaust is the best way to combat knock also.
I dont know if GTPs can use the f body... they have a true dual setup...
Look at willwrens signature........ The GTP'* have a 2.5" central pipe into 2 seperate 2.5" pipes to the back, to 2 mufflers. better to have 1 central pipe then to 2 seperate outlets. Keeps some backpressure.

Hmmm.........Maybe keep stock mufflers, but upgrade to a High Flow Cat?
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Old 01-28-2004, 02:35 PM   #16
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Quote:
Originally Posted by 94Regal
Look at willwrens signature........ The GTP'* have a 2.5" central pipe into 2 seperate 2.5" pipes to the back, to 2 mufflers. better to have 1 central pipe then to 2 seperate outlets. Keeps some backpressure.

Hmmm.........Maybe keep stock mufflers, but upgrade to a High Flow Cat?
I know Will is running a F-body, come this summer, I will too. Bonnevilles come with a single in dual out muffler, but the GTP has a true dual... I would stick to that if at all possible beacuse GTPs produce boost, and if your friend is thinking of upgrading a pulley he is going to have more air flowing through the exhaust system... so my suggestion would be to remove the u-bend and add some new magnaflow mufflers, and keep it a true dual...
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Old 01-28-2004, 07:05 PM   #17
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Quote:
Originally Posted by 94Regal
Quote:
Originally Posted by 97NAbonneville1
Quote:
Originally Posted by 94Regal
That car, even in the winter time with all the slipping and Traction Control action, andf that RESTRICTIVE pos airbox, and it still scares me how hard it pulls.

I suggested he get magnaflow f-body muffler. Anyone elses opinion? Its not so much about loud or tone, but I know in spring he is prob gonna get a 3.4" pulley, and NGK plugs, with our custom intake so, exhaust is the best way to combat knock also.
I dont know if GTPs can use the f body... they have a true dual setup...
Look at willwrens signature........ The GTP'* have a 2.5" central pipe into 2 seperate 2.5" pipes to the back, to 2 mufflers. better to have 1 central pipe then to 2 seperate outlets. Keeps some backpressure.

Hmmm.........Maybe keep stock mufflers, but upgrade to a High Flow Cat?
The GTP'* stock exhaust is a 2.25" pipe, which has a cat, the restrictive u-bend, then the resonator, then that splits into 2 seperate 2" pipes which each have their own mufflers.

If he doesn't mind the sound of the stock mufflers, it isn't going to hurt him any performance wise to keep them. They flow more than well enough to run 11'*, and I am pretty sure he isn't planning on doing that anytime soon. I would definately however replace the downpipe, cat, and u-bend. The most important of those is the u-bend though, then the downpipe, then the cat. You can buy a bolt-up unit (assuming the flanges on the stock exhaust haven't been chopped off) that takes ~10 minutes to install and flows VERY well. It isn't cheap though. Its a little over $300 IIRC. They sell it on 3800performance.com, it is the random technology one. Thats what we run on the GTP, only we have the one that is made to weld up to the headers, and it is great IMO.

If he wants better sound though, I would go with either a magnaflow or a borla muffler. I personally like the sound of both of them, they have that deep but quiet sound, and don't sound ricey when you rev the car up.

And if he is considering a pulley, have him get it on ASAP. That will give him WAY more gain than any other mod for the money, and he will only be mad that he didn't put it on sooner. It is a MUST HAVE.

Quote:
I know Will is running a F-body, come this summer, I will too. Bonnevilles come with a single in dual out muffler, but the GTP has a true dual... I would stick to that if at all possible beacuse GTPs produce boost, and if your friend is thinking of upgrading a pulley he is going to have more air flowing through the exhaust system... so my suggestion would be to remove the u-bend and add some new magnaflow mufflers, and keep it a true dual...
The exhaust on a GTP is NOT true duals.

Shawn
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Old 01-28-2004, 07:16 PM   #18
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WOOPS... I guess I phrased that wrong... I meant that the GTP has dual mufflers not just a single in with a dual out... sorry Shawn.
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Old 01-28-2004, 07:44 PM   #19
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What Bonnevilles don't have dual mufflers??? I know our SSEi is set up very similar to the GTP. It has one pipe with a cat & resonator that splits into 2 other pipes that each have mufflers. The earlier ones aren't like that?

Shawn
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Old 01-28-2004, 07:46 PM   #20
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No 92-99 has one huge muffler that has a 3" inlet and two 2.5" outlets(I belive).
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