Ok well I'm running a 07 Chevy cobalt LT 2.2L with a badmab header, ZZP DP, Cat back and k&n air intake . My car only has 48000-49000. So were I'm getting at is witch is better? Tc or sc? I want pros and cons on both items don't leave any thing out and were to start or either or if I'm going to do this since I can't buy the whole kit at once since it runs like 1000-4000 for either or. Member I also don't wanna mess my engine up neither since I have at least a good 10-20 years left in this car ..