mods

I have a 2001 chevy impala basic model with the 3.8, i want to put on a good exhaust this summer, one that sounds the same but when u step on the gas you'll hear it roar, thinking a dual exhaust any good priced ones out there? Then im going to put on the tail light covers to give it a different look and maybe paint the black moldings silver same color as my car. And maybe a better intake. My car for some reason takes of slow if i am at a dead stop and floor it TRAC off tires will sqeak but it goes real slow but if i am doing 30 mph then floor it, takes off like a bat outta hell.

Try here for some good performance accessories assuming you have the 3800motor...

http://www.3800performance.com/index.html

The biggest mod i am going to make if i can get a good deal is a dual exhaust, im the kind of person that likes to hear the engine.
would my gas mileage go up or down?
im also putting on a new cold air intake.