The only engine that will drop in perfect is the regular rsx engine (K20A3). I have one for sale cause I am doing the type s swap in my car. I am loking for 3500.00 for the whole swap. Engine has 13000 miles on it and has been dealer maintained. Email me at email@example.com if you are interested. Oh and the type S or R will not just drop in because you have to do a custom shift linkage made for the 6 speed trans.