i installed a k&n air filter, replaced exhaust pipes from cat back with a 3" dia.
pipes and free flow muffler, i get great mileage 16 mpg in the hwy, and decent
power response, but ; i want more , any sugestions will be appreciated.

thank you.

 

If you're looking for an inexpensive solution with very good power: http://www.motorhaven.com/home.php?cat=37
If you want to spend a little more and get a code read and the ability to modify the tunes:
http://www.motorhaven.com/home.php?cat=249
http://www.motorhaven.com/home.php?cat=169