i had crower and aem cam gears and gears and only put 10hp to the ground...so i would'nt get them.i honestly think they are a waste of money... who ever designed the head on our cars was a hell of alot smarter than all of us and im just gonna go with what they say..but i have heard good things about the jdm cams....(same guys that orignaly desinged ours) :dunno: