Billet Aluminum Ford Small Block Crankshaft Pulley Spacer (4 Bolt) Crankshaft Pulley for 302, 351W, 351C or 351M. FITS VEHICLES WITH: ---Aftermarket 4 bolt damper ---Water Pump with Driver's side lower radiator hose. ---Dampener face to water pump flange face 4 1/4" USE THIS .950" THICK SPACER WITH SBFL SERIES PULLEYS AND THE FOLLOWING DAMPERS: ---Ford Racing Damper ---Summit Damper ---Professional Products Dampers ---Trick Flow Specialties Dampers ---ATI Performance Products Note: Fluidampr balancer requires .
