MagnaFlow X-Pipe/Muffler from the cats to the axles, from the axles back MagnaFlow as well. The sounds is incredible. Here's a link to a video on YouTube.... but it doesn't give it justice. Lemme know (PM me) if you want to check it out in person sometime.
Video:
http://www.youtube.com/watch?v=_LiIX...er_profilepage
Specific thread you might wanna check out:
http://www.camaro5.com/forums/showthread.php?t=33493