POWER Throttle BodiesFeature some unique design characteristicsDesigned for the throttle blade to open at the bottomDesigned our throttle plate so that when you fi rst step on the gas, only the lower portion of the throttle plate is opening.This only allows half as much air into the engine as found on most other aftermarket throttle bodies.This is also the way the O.E. throttle body is designed.These throttle bodies fit TPI style injection systems only.