Are their any after market mufflers that are shaped with the piping like stock so they just bolt in? Instead of getting an expensive cat-back system just like the end part? Would doing this yield any hp or just improved sound? Where can you get one and how much $ do they cost? Any sound clips available.

 

stillen...cattman and i think HKS has an axleback muffler setup...but theu are like 300 bones so ur better off spending another 150 for the whole cat-back

 

Check the exhaust sticky at the top of the page for sound clips.

 

Just buy a greddy sp2