Good used water pump pulley. 2 groove.GM#3995641CS66-68 300HP & 350HP w/AC69 350HP All70-71 350HP except ACApproximately 5 3/4" Diameter1966-1971 Corvette 2 Groove Water Pump PulleySKU: 3995641-U$375.00PriceQuantityAdd to Cart