Heater Hose Outlet is 5/8 in. Top Street Performance HC8014BK Chevy Small Block Mechanical Water Pum.
TSP's high-flow mechanical water pumps provide that cooling power your high-performance engine demands. They are lightweight and flow at a rate up to 40% over stock pumps. LIGHTWEIGHT ALUMINUM HOUSING All mechanical water pumps from TSP are cast from lightweight A356 aluminum and heat-treated to T6 hardness. This not only provides strength, but aluminum works to manage heat far better than cast iron.They are available in a satin, polished, or chrome finish. HIGH QUALITY COMPONENTS From top to bottom, TSP's mechanical pumps are designed for greater performance and reliability. They feature an 8-blade, cast aluminum anti-cavitation impeller.
Its 5/8" shaft is driven by heavy-duty bearings and seals, and the crank hub is 1/2" thick for added strength. Chevy small block Gen I. Water Pump Style (Application) 2.