yea thats kinda what i was afraid of it has carbon fiber reeds to cant tell what kind cus its a stock cage and when i got it he told me it wiesco cranks and pistons would that effect what kinda gas i should run or is it when u start doin head work cus i was gonna put cool heads on it but didnt know what kinda dome i needed to run pump gas and maybe sumtimes vp c12 or is that a hole diff setup?