I have the comptech cat-back, comptech intake, and the ice box.. still waiting on the header cause i heard that it doesnt make that much of a difference. I definitely love the exhaust I installed everything myself and it was relatively easy. The exhaust is great because its not too loud and gives a very aggressive note under full throttle. I did notice after long periods of driving, esp. on the interstate, that the exhaust tends to get louder... I have a couple of complaints about the ice box though.... The lid to it constantly likes to pop up on the corners, I think its from the heat and the plastic warping but after messing around with the way it was installed i was able to make a tighter seal. Also i like the exhaust because a lot of ricers dont know what kind it is and they always ask...