Tuff Stuff water pumps are hand made from premium quality new components - not remanufactured and are quality built in the USA. Precision-made ball/roller bearings and spin-balanced fan hub sustain higher RPMs. Our SuperCool option includes a custom water impeller that flows 30% more coolant to reduce water temperature by up to 20 degrees. Available in chrome plated, polished aluminum, powder coated or as cast finishes. Platinum SuperCool Fits Chevy Big Block Long Water Pump. 7.28 inch Hub Height. 5/8 inch Pilot. Long. Flat Smooth Top And (2) Threaded Water Ports. Black Chrome finish.