Heads Pontiac "Performer RPM" (72cc) - PairNICE Parts but not cheap THIS IS A PAIR SET of ROUND PORT Pontiac Alloy Heads.. Designed for 65 79 389 up thru to 455 CI Pontiac Engines . This head is after designed after the 69 70 Ram Air IV Pontiac Cylinder Head.. one of the MOST favoured and sort after head in Pontiac living memory.. & designed to maximise performance running low octane fuel. These 72cc heads produce outstanding horsepower with excellent low speed torque and throttle response.