I wonder if I could talk Jim Repp into joining this forum, he'd easily put the kabosh to the butt-dyno fueled rumors that bigger throttle bodies or different air intakes cause the engine to produce more power. But then what does he know? He was only Jeep's chief design engineer who recently retired after having started in the CJ days. If anyone wants to 'friend' him on Facebook to ask him directly, he's there as James Repp. Jim was also the creator and and reason for the Jeep Rubicon which was his baby from start to finish.