More information about O.S. Engines Carburetor Reducer 8mm Red .21 VZB (P) V-Spec OSM71533000
O.S Engine carb reducer mounts into carburetor venturi to reduce the amount of air flow which assists in increasing the amount of torque produced.
Requires: .21 VZ series engine
Length: .584" (14.84mm)
Width: .316" (8mm) at base
Diameter: .50" (12.7mm) where reducer enters carb