bro, i think you better study the history of g13b before you come out with this statement. g13b with proper part can easily rev to 11k rpm. No kidding !G series engine is a big head and M series a small head.different Comp ratio.M series can rev 9500 and a sound like superbike.M15a can more reving
its not about how much you can rev, its about how good your clock your car for 1/4 mile
sorry if my statement hurt you.. its just my personal opinion..