Blox Racing 70mm Billet Throttle Body Honda K-Series ApplicationsBLOX Racings popular Honda K series throttle bodies design has been updated. Now, these billet units feature a dual pattern bolt design that fits the PRB PRC and RBC RRC intake manifolds. Now, the typical RBC throttle body adapter is no longer necessary! Each throttle body is CNC machined from billet aluminum and includes a new throttle bracket. Precision machined butterfly plates ensure proper and consistent opening and closing. New throttle springs