One of the best tune needing kits out on the market right now is one from troyer. I think dynatech makes it. It does cost $$$$
One of the other mods I like is the high flow cats and cat back from magnaflow. No tune required.
But if you want the biggest bang for your buck. Get a magnaflow 12" si/so cut out the stock muffler and add a piece of pipe, put a nice 15" tip w/rolled edge on and wahlah! a nice sounding system for under a $150! Just need about 3 or 4 clamps and most of your stock piping and hagers.
Rockauto.com has all the parts.
So there are a few more suggestions.
Lars
