S&S Cycle HVHP (High Volume High-Pressure) Oil Pump with Universal Cover 31-6208 Designed to meet the demands of the new S&S Super Sidewinder Plus series motors Pump produces 38% more volume and 61% more return over stock type pumps Severe duty billet steel gears provide long life and durability Unique oiling system allows pump to oil top and bottom end even in extreme conditions maintaining 10-35 psi. in most cases