That depends on how much $ you're willing to cough up. For low budget engine, u can try the D16Z6 which would probably bolt on with minor mod's. Or if you're middle class, go with the B16's with more mod's and $. If you're a walking piggy bank, go for the B18C's or ITR with about the same mod's as the B16's. All of these will fit in your CX Honda and depending on who's installing it, it'll look like it's factory installed. I've got a CX myself and about to drop a B series in there, but I'm pressed for $ though.