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To complement our aggressive mechanical roller camshaft, McAfee ordered a complete shaft-mounted rocker arm system from Jesel. After hearing about the engine's specifications, Jesel came up with its top-of-the-line Mohawk Beam Pro Series shaft assembly (PN KPS-11057). At 195 grams each, this is Jesel's stiffest, lightest rocker arm with the lowest moment of inertia while producing precise valve control with minimum frictional losses.