My bike had mods before it was ever rode. was 174 rwhp 75 ft elevation. pair valve removal, HMF duel high mount, PCIII, Small airbox mod, ATRE. BUT dude that did the dyno actually thought his machine was broke it was so high. he re-calibrated it and pulled the same. dropped another Busa on same mods but muzzy pipe right after mine and it pulled 164 rwhp. basically he said mine was just a mutant. he had never seen a stock engine/ECU busa pull that much. guess i got lucky from factory.