RCM 67mm Electric Throttle - Reversed Manifold Fujitsubo this enables a clear un-obstructed

this enables a clear un-obstructed flow from the throttle body into the plenum

commonly refereed to as VTEC KILLER set ups

This happens inside of the car

RCM Double Valve Spring Set

RCM 67mm Electric Throttle - Reversed Manifold Fujitsubo this enables a clear un-obstructedThe RCM drive by wire electric throttle body has been designed and engineered specifically for Subaru applications, for vehicles using a reversed inlet manifold configuration. Manufactured from machined billet aluminum housings, it is fully assembled and ready to bolt directly to your reversed manifold, it is balanced and calibrated to a set idle condition. Patented shaftless technology, gaining up to 7% more airflow Failsafe spring return Operational