Thanks. I still have the factory door speakers in for now and they're kind of crackeling. The alpines are actually hitting harder than my friends camaro that has 2 10's in the back(his crappy sealed box is why, but it sounds good). How is the bass with your infinity setup in the doors? And did you use the factory 5 1/4" size? My friend suggested the reference series to compliment the low range bias of my type s's. He said they were more mid to high range speakers. I'm planning on no subs at all, and even if I add the 2 by the back seats, you won't be able to see them. Everything looks stock now, and that's how I plan to keep it.