If I might give ask a question, do you want suspension, or speed out of your car? Either way your probably looking at a decent amount either way. If your thinking suspension tire and wheel size might need to be decided first. The best place to look is TVT performance, as far as speed goes. There are several ways to go with exhaust, magnaflow catback, ansa muffler, good luck finding good sound clips though. there are several on utube. Lucky for you you got the srt 6, I could not find one close enough to look at, and your performance can be greatly improved. Start with tvt if your wanting speed. Good luck and definately put us on your favorites, your answers are here if you do some reading. chris