A vacuum pump can generate in excess of 22in of vacuum and is so effective it liberates 25 to 30 extra horsepower. It has the ability to improve ring seal and efficiently evacuates the turbulent air and oil mist from the under the reciprocating pistons in the crankcase, the valley area under the intake manifold, and the valve gear chambers on top of the cylinder heads. It often discharges to a canister through a port in the valley (under the intake plenum) or from the front face of the right cylinder head.