Great news everyone. I just noticed that ZZPerformance has revamped and expanded. They still have the GP store but now are going to start development on G6, ION, and the Cobalt. Expect only the best performance parts to come out of Zoomer and the guys. They are the only company I would trust for GM performance.
Well the Grand Prix is getting rather expensive and GM will be dropping the 3800 series engine soon and replacing it with the 3900. So basically they will be building parts for both the G6 GTP and the GP GT. I doubt they will even bother to do too much with the GP GXP. And I am sure they will develop for the 3.5L as well considering that is the car that they have right now.