Aluminum High Water Flow 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 5-1/4" in diameter.