AlanSr

My Goat is stock with a K&N drop in and a resinator delete.
If I cut my mufflers off and put on straight pipes; would I loose to much back pressure?

If so I guess I can look into some Loudmouth 2's.

 

Ronin GTO

There are a lot of Goats running straight pipes so you should be good. It will be pretty darned loud though.

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OldDog

I have a 05 M6. I originally install a Magnaflow cat-back system. The sound was a little tame still so I replaced the mufflers with a set of magnflow resonators. It sounds great now!! I don't feel a diff in power and I have not raced for time so I can'tay if I have lost anything but if I have it is not much. I am sure my new headers and cam will make up for that.

NJSierra

Im going with the old but goody Original 40 Series Flowmasters split at the rear tires.... I have the performance mod in my blood line....I dont know how many times I have said "Im not doing nothing to this one". It is a disease!!!!

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SOLD: 2006 Torrid Red GTO- Superchips, Poweraid TBS, AEM CAI., JHP Sports Gauge Pod, NGK TR55IX Iridium plugs, Vinyl decals/inlays, Lloyd custom rubber floor mats/cargo trunk mat, window tint, resonator delete, and Flowmaster Super 44's!

JerseyGoat

I put straight pipes through the stock mufflers after i cut them open aqnd emptied them out. The car is alot louder and i didnt feel any noticable loss in power. I have a full K&N cai and just those straight pipes and put down 353 on a dynojet.