I would buy a power tuner, but I don't plan on modding my car past the 3.4 till I'm out of college. But maybe one day I will get one. My goal is to turbo my car when I get out of college. Gut the M90, use it as an I/C via the intercooler setup on ZZP, and go from there. If I do that I'll be making some bigtime ponies.