Originally Posted by
kiwikermit
That is the sort of info I mean by better. Improved distribution sounds like a good start. What about throttle response? HP and Torque differences?
Back to back test RS500 plenum against the Hart no other changes the Hart made an extra 37bhp on Norris Designs dyno. We are talking high end Spec here but something was working better thats for sure they were both spaced. Why buy a copy the Hart is proved to work never neard of such a result on a blatant cheap copy.