LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super
View Poll Results: Which mufflers do you think?
SLP Powerflo
1
7.14%
Magnaflow Oval Mufflers
9
64.29%
Magnaflow Round Mufflers
2
14.29%
Borla ProXS
2
14.29%
Voters: 14. You may not vote on this poll

In the market for new mufflers

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Old Oct 20, 2009 | 05:29 PM
  #21  
DP 08 GXP's Avatar
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Originally Posted by 06MCLTZ
I've been wanting a cutout for sometime but just havn't done it. Either way I'm changing mufflers, but quieter mufflers with a cutout don't sounds bad. What kind of cutout to you guys have and where is it located? Also what size would I need? Where did you guys mount your switch?
here is a thread with a some info on cutouts

https://ls1tech.com/forums/ls4-front...c-cut-out.html

mine is where the res used to be and is 2.5''....my switch is in front of shifter by the little cubby hole the GXP has.
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Old Oct 20, 2009 | 05:51 PM
  #22  
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found one when i still had the res. on

http://s447.photobucket.com/albums/q...t=100_1069.flv
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Old Oct 20, 2009 | 06:41 PM
  #23  
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Quaility of material and craftsmanship as well as performance for sound I would go with Borla bolt ons....but for bolt on performance for single pipe and cat back exhaust, I would say Magnaflow...but this is just being a former Borla owner and the Magnaflow in just in my opinion because they have a lot of bolt on full systems for just about any car..so they hit it first for systems in my opinion, but havent been around alot of others...
Before turbo, I had two Borla turbo muffs with no cat or res....it was nice!!! i still have those around by the way with the custom made chrome double rolled in tips!! if anyone is interested
Attached Thumbnails In the market for new mufflers-077.jpg   In the market for new mufflers-024.jpg   In the market for new mufflers-079.jpg  

Last edited by Rossko85; Oct 20, 2009 at 06:49 PM.
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Old Oct 29, 2009 | 07:22 PM
  #24  
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From: Renton, WA
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no mufflers res only with some nice tips. Think about how much weight you'll save. About 40lbs or so. That's 1/2 a tenth!!
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