Ac!D Hi mate, it's got a EJ25 bottom end and all sorts of engine mods inc oil cooler ect, td05/06 20g turbo,6 speed sti7 gearbox,hks twin paddle clutch loads of things,but you really should ask bob who's posted above because he had all the work done,all I'm doing is enjoying driving it about with a big silly grin on my face.[]