Aux pump bolt. MAIN. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Supercharger Intercooler to it's Mounting point. Engine Oil Cooler Bolt. Engine Water Pump Bolt. Radiator Mount Bolt. Auxiliary Pump. Charge Air Cooler. Engine Oil Cooler. Engine Water Pump. Intercooler. Radiator. Rivet. Side. Threaded.