Ive got the greddy type s, Sounds so bad ***, and was easy to intsall. Just remove the cast aluminum ic pipe where the old one was, "you can either put it there or if you don't have an airpump put it in front." that made fitting it in easier for me, and just cut a hole, get an aluminum flange, and tig weld it on, and then weld up old bov hole in pipe and stick a rubber cork from the hardware store in the intake pipe, It was easier than sounds. But gets lots of attention going down the road, And most hondas just back off, and don't try to rev on me now.