This Double 6-Rib Aluminum Serpentine Ratio Pulley Kit for Chevy Big Blocks with Standard Rotation Long Water Pump with a 7.287" Engine Block to Water Pump Flange Measurement. Designed to Replace Factory V-belt or Steel Serpentine Pulleys.
This Kit Includes:
- Double 6-Rib Crank Pulley in 5-3/4" Diameter
- Single 6-Rib Water Pump Pulley in 5-1/4" Diameter
- Single 6-Rib Alternator Pulley in 2-3/4" Diameter
- All Mounting Hardware