Aluminum Performance Ratio Double Groove Water Pump Pulley for Ford Small Block 289, 302, 351W, 351C, 351M and 400M with 4 Bolt Damper and Standard Rotation Water Pump with Driver Side Lower Radiator Hose. Designed to Replace Factory V-belt or Steel Serpentine Pulleys with a Water Pump Flange to Damper Face Measurement of 3-1/4".
This item includes a 2 groove water pump pulley that is 6-1/4" in diameter.