Originally posted by tirodēslc
as far as i know (or did know) the k20a2 is the type s and the k20a3 is the type r
edit: fawk that.. a3 is the 160hp si and base rsx engine lol... yer right :doh:
K20A(5?) is Type-R, K20A4 is Type-S, K20A3 is Si. I think.