I like Borla you can get for around $400.

 

DCSports (now owned by AEM) just started making some. Their products have always been impressive, i have yet to hear any reviews though. I believe they run around $500. Gruppe-S also sells one that is very comparable to the borla, a few members on the board have them too if i'm not mistaken. There are also some 4-2-1 headers compared to all the 4-1's previously mentioned, but they are el buckos $$$.

 

port port port port them and heat coat

 

costal dyno $250 with out install im getting mine done right now call sam 8492423 and see if he can modd for heat shield b/c mad heat soak