2.5" vs. 3" exhaust?

[88Racing]

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