Cast aluminum double groove V-beltpulley for '55-'68 Small Block Chevy short style water pumps. Fits over 5/8" water pump snout but can be drilled out to 3/4" if needed. Precision machined aluminum constructionLightweightand strongDoublegrooves for two V-belts
Cast aluminum double groove V-belt upper pulley for'69-'85 Small BlockChevylong style water pumps. Fits over 5/8" water pump snout but can be drilled out to 3/4" if needed. Precision machined aluminum constructionLightweightand strongTwo grooves for V-beltsHub surface to first groove center: 2.415"Center-to-center of grooves: 11/16"Center hole fits a5/8" shaft (can be drilled out to 3/4" if needed)Diameter: 6-5/8"It may be necessary to shim either or both of the pulleys to achieve perfect belt alignment.There are variances between manufacturers of both water pumps and pulleys.Water Pump ...
S/B Chevy double groove cast aluminum lower pulley 25% reduction. Available for short water pumps. 5/8" shaft.Precision machined from high grade lightweight aluminum castings Extra-deep belt grooves provide added belt retention during rapid changes in engine RPM Small pulley diameter slows fan water pump and alternator speed to reduce horsepower-robbing drag High RPM water pump operation is improved reducing impeller speed below cavitation threshold 5-3/8" diameter
S/B Chevy, double groove cast aluminum lower pulley, 25% reduction. Available for short water pumps. 5/8" shaft. Precision machined from high grade, lightweight aluminum castings Extra-deep belt grooves provide added belt retention during rapid changes in engine RPM Small pulley diameter slows fan, water pump, and alternator speed to reduce horsepower-robbing drag High RPM water pump operation is improved, reducing impeller speed below cavitation threshold 5-3/8" diameter