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Boyesen ATV Reed Rad Valves provide sharper throttle response and more horsepower by maintaining flow velocity and redirecting the intake charge to the intake ports. They offer one-piece aluminum casting, with no manifolds to trim, no plastic pieces to insert, and no messy glue, which can warp, shrink, melt, or crack. Rad Valves come complete with the valve, reeds, intake flange, gasket, and clamps.