Just got a 2006 Grand Prix gt with the supercharged 3.8..all I've done so far is a magnaflow down pipe/converter, and a cone air filter shoved on the end of the maf..this car is my daily driver, and I plan to mod it over time as money allows..with less than 80,000 on the clock, I hope to have a lot of years to enjoy his car...I came to this forum to gain more knowledge in these cars and what they can do...any tips for future mods would be greatly appreciated!