I have the SLP center mount exhaust that came from the factory as part of the 345 hp package. I love the sound of the loudmouth though. Would getting a loudmouth help/hurt my performance

 

Wouldn't hurt it, but probably wouldn't see a big gain in power but it'll be a bit louder.

 

you can go to any decent shop and ask em to rip out the muffler and replace it with just straight pipes. Then put one of those bullet mufflers on the I-pipe.

Then you can have your cake and eat it too!

 

Thanks for the responses! The resonators (bullet muffler) you can order from SLP for about $125 so I think that's a really good idea, Thanks for the input it helped a lot. It should sound badass with those new longtubes