Performance resonator for the LS4
Thread Starter
Staging Lane
Joined: Jan 2008
Posts: 92
Likes: 0
From: Chicagoland area
Performance resonator for the LS4 I finally got an answer from Dynomax (the performance division of Walker Muffler) about replacing the OE resonator on my Buick Lacrosse Super with a less restrictive one. The only one they currently stock is for the 2005 Pontiac GXP (part no. 24235) but it will also fit the Super. Their customer rep said it should make my exhaust note a little louder without sounding raspy. I hope so.
Link: http://www.dynomax.com/ecat/pdfs/passengercarcats.pdf
Note: The catback system (with resonator) for the '05 Pontiac GXP is shown on page 65.
Link: http://www.dynomax.com/ecat/pdfs/passengercarcats.pdf
Note: The catback system (with resonator) for the '05 Pontiac GXP is shown on page 65.
Last edited by jpstax; May 11, 2008 at 11:46 AM.
TECH Fanatic
Joined: Jan 2007
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From: LITH, IL.
resonators have essentially zero restriction, the only performance gain from swapping one for the other will be because your wallet is lighter, thus making your total running weight slightly less...
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Thread Starter
Staging Lane
Joined: Jan 2008
Posts: 92
Likes: 0
From: Chicagoland area
Thanks for all the suggestions. However, I don't want an exhaust note loud enough to **** off my wife while we're on long trips. Also, what guarantee do I have it won't sound too raspy if I eliminated the resonator?
Last edited by jpstax; May 12, 2008 at 11:24 AM.
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TECH Fanatic
Joined: Jul 2007
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From: Reading, Pennsylvania
I've heard it's raspy without it and I've heard other people say it's not, so I guess there is no guaruntee. I would just leave the stock res on there personally if you want a res on there.
TECH Fanatic
Joined: Jun 2007
Posts: 1,316
Likes: 3
From: Dolla$ , TX
I installed flowmasters wanting a louder sound and wasn't satisifed so i removed the resonator and it did nothing to make it louder IMO. I ended up with a exhaust cutout to get the sound i wanted. To me it was a little more raspy but only when free reving
Thread Starter
Staging Lane
Joined: Jan 2008
Posts: 92
Likes: 0
From: Chicagoland area
My fears have been put to rest after seeing this video:
http://videos.streetfire.net/video/2...Prix_58851.htm
I knew I'd someday find a video of an LS4 powered car with stock mufflers and its resonator removed. The exhaust doesn't sound too loud, and I'm not worried about interior noise because of Buick's "Quiet Tuning" system, which uses several layers of sound-deadening materials.
http://videos.streetfire.net/video/2...Prix_58851.htm
I knew I'd someday find a video of an LS4 powered car with stock mufflers and its resonator removed. The exhaust doesn't sound too loud, and I'm not worried about interior noise because of Buick's "Quiet Tuning" system, which uses several layers of sound-deadening materials.
TECH Enthusiast
Joined: Jan 2008
Posts: 546
Likes: 0
From: Missouri
Sounds stock to me. Trust us. Alot of us have done this. Removing the resonator does 0 to nothing to your car. Swap the mufflers for something cheap and remove the Res. Here's an example of my exhaust. Resonator delete, magnaflow knockoffs.
http://s226.photobucket.com/albums/d...t=MVI_0686.flv
http://s226.photobucket.com/albums/d...t=MVI_0686.flv
Last edited by Semper91-RS; May 24, 2008 at 04:38 AM.
