Hey people's. Just dropping in to introduce myself. I picked up a 04 SLE black/black last month. Has 250k on the clock but its super clean. Except for some bubbling around the gas door and the gauges. Previous owner has a good collection of receipts of just about everything including a transmission rebuild about 80k ago. Not lookin to do anything crazy to it. Gonna be the DD so at most intake and exhaust. Which brings me to my first question. Where can I get exhaust for this thing? I've looked and I can't find any downpipes or cat-backs for these cars. Other than Corsa and borla for the Gxp's, way too much money.
Cheers
New from Iowa
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Andrew.nash
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maroon111993
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Re: New from Iowa
What I did was have the resonator removed, u-bend delete, and turbo flowmaster mufflers. Sounds great 
1997 Grand Prix GTP "Black Ice, 'cuz it's slick" - 17" Motegi Racing Rims, Hankook Optimo Performance Tires, 'Big 3' Wiring Upgrade, Weapon R Secret Weapon Intake w/ Ram Air, Larger SuperCharger lines, AutoLite 104's, U-Bend Delete, Resonator Delete, Cat Delete, Turbo Flowmaster Mufflers. 342bhp, 327 lb-ft torque, 9.091 boost psi @ 6,012 rpm.
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myfirstbonnie
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2015 Buick Enclave
2013 Buick Regal GS - Location: Hillsboro, Oregon
Re: New from Iowa
We Bonnevilles do not have the U-bend.
Welcome to the club. There are no bolt on aftermarket exhausts for these. You just have to find something you like and have it installed.
Welcome to the club. There are no bolt on aftermarket exhausts for these. You just have to find something you like and have it installed.
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maroon111993
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Re: New from Iowa
Well, you lucky ducks!myfirstbonnie wrote:We Bonnevilles do not have the U-bend.
1997 Grand Prix GTP "Black Ice, 'cuz it's slick" - 17" Motegi Racing Rims, Hankook Optimo Performance Tires, 'Big 3' Wiring Upgrade, Weapon R Secret Weapon Intake w/ Ram Air, Larger SuperCharger lines, AutoLite 104's, U-Bend Delete, Resonator Delete, Cat Delete, Turbo Flowmaster Mufflers. 342bhp, 327 lb-ft torque, 9.091 boost psi @ 6,012 rpm.
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Andrew.nash
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Re: New from Iowa
Not even a downpipe? I've seen downpipes for bonnevilles up to 03. But nothing that says it will fit a 04. What's the difference? A cat back isn't that big of a deal. I can Just change mufflers. I'm not goin for power anyways. That's what I have my WS6 for. Just gonna be looking for ways to get the best mpg I can. And freeing up the flow is the first step
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nos4blood70
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Re: New from Iowa
Welcome!
Anything that fits the 2000-2003 will fit the 2004. However a downpipe will not make a drastic change to your exhaust sound. You would need aftermarket mufflers and perhaps a different resonator to change it appreciably. However, most don't like how the 3800 sounds when it's unmuffled drastically. It's all your taste though.
Anything that fits the 2000-2003 will fit the 2004. However a downpipe will not make a drastic change to your exhaust sound. You would need aftermarket mufflers and perhaps a different resonator to change it appreciably. However, most don't like how the 3800 sounds when it's unmuffled drastically. It's all your taste though.
-Car Guy Carl
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
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Andrew.nash
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Re: New from Iowa
I am not a fan of how these motors sound with exhaust. BUT I am a believer that any system can flow better and not be stupid loud. A high flow cat in a larger downpipe will help with flow enough to warrant the change IMO. Plus, they're not that expensive. Thanks for letting me know it will fit
Re: New from Iowa
not sure on Bonneville's but grand prix stock cat-back exhaust is good for over 300whp without being restrictive