Conventional oil pumps shut off oil to the crankshaft at idle, and do not start delivery of oil until 1900 RPM. The Pro-Series® patented billet oil pump has been engineered to give your crankshaft a constant flow of oil at any RPM. Idling and stopped or crawling in traffic, it doesnt make sense to stop sending oil to your bottom-end. This patented design will add life to your crank pin, rods, pistons, and cylinders by drastically reducing operating temperature. By using a unique three-valve system, a proper amount of oil is supplied to the tappets and top end at all times. Another innovative work of art from TP Engineering.