Supercool Platinum Shorty Water Pump for Ford 5.0L, 302 and 351W Low-profile aluminum standard pump provides up to 1.5" of additional water pump clearance. Ideal for installing a small block Ford engine with V-belt into space-constricted engine compartments. Replaces Ford Racing water pump M-8501-E351S. Must be used with long-style (3.950") 4-bolt crankshaft damper and requires custom pulley (not included). 3/4" Pilot, Polished Water Pump - Mechanical - Platinum Series - High Volume - Shorty - Aluminum - Polished - Small Block Ford - Sold as Each - Brand - Tuff-Stuff - Part Number: 1625NH Specifications Brand Tuff-Stuff Part Number 1625NH Product Line Platinum SuperCool Pilot Diameter 3/4 in Shaft Diameter 3/4 in Short / Long Design Short Rotation Standard Pump Flow High Flow Hub Height 4.312 in Material Aluminum Color Polished Finish Polished Quantity Each Notes Must Use W/Long Style (3.95 in) 4-bolt Crankshaft Damper