Provides sharper throttle response and more horsepower by maintaining flow velocity and redirecting the intake charge to the intake ports. One-piece aluminum casting; no manifolds to trim, no plastic pieces to insert, no messy glue which can warp, shrink, melt or crack. RAD valve comes complete with valve, reeds, intake flange, gasket and clamps. Special replacement intake flange and reeds also available for the RAD valve assemblies.