i dunno idrees. heres the spec Cruise Valve Springs NST Crank Pully Fully race balanced Service cylinder head Replace all valve guides Service and replace (as necc) valves,lap and vacuum test. Surface grind head face 0.005â? Strip,prepare,wash and rebuild with new stem seals and springs 265 billet cams guessing its pretty modified. had a look at giggs dyno readout n the afr seems to be up n down. that normal for td04s at 1.2? i've only seen ct9s etc n there norm fairly smooth. cheers for info guys. just wanna be sure