Alpha Series 70mm Throttle Body

The Omni 70mm Alpha Series throttle body is a performance-oriented upgrade engineered to maximize airflow on Honda B, D, F, and H-series engines. Built using precision die-cast aluminum, it features a fine shot-blasted surface finish and a precision-machined brass throttle plate to ensure smooth operation under both naturally aspirated and forced induction conditions. The unit includes a new gasket and hardware, plus idle adjustment screws for fine-tuning. Due to the larger 70mm bore diameter, installation requires either the use of a Skunk2 Pro Series intake manifold or manual adjustments to the intake manifold throttle body flange to match the bore while keeping the Idle Air Control (IAC) passage separate. This product is for manual transmission vehicles only. Compatibility constraints are critical: this part is not compatible with the B18C GS-R intake manifold, nor is it for D-series engines featuring down-flow intake manifolds. Additionally, it fits the F20C engine but does not fit the F22C engine. This component is designed exclusively for closed-course racing or competition use and is not legal for street use.