Sb Chevy Sngl Lwp Upper

The TRANS-DAPT Small Block Chevy Single Long Water Pump Upper pulley (part number 9604) is a precision-engineered V-belt drive component designed for small block Chevrolet engines requiring reliable coolant circulation and accessory drive performance. This chrome-plated steel pulley features a single groove configuration and 6.3-inch diameter, optimized for long water pump assemblies common in classic and modern small block applications.

The 6.3-inch diameter sizing ensures proper belt tension and rotational efficiency for water pump operation while accommodating serpentine or V-belt routing systems typical in small block Chevy engine bays. Chrome plating provides corrosion resistance in high-heat engine compartment environments, protecting against rust formation from coolant splash and atmospheric moisture exposure. At 1.38 pounds, the pulley maintains lightweight design while delivering the structural integrity required for sustained high-RPM operation. The single-groove V-belt profile is compatible with standard small block Chevy long water pump shaft configurations, making this a direct replacement for worn or damaged pulleys.

This component serves engine builders, restoration specialists, and small block Chevy enthusiasts performing cooling system upgrades or routine maintenance. Whether rebuilding a classic muscle car, restoring a street rod, or servicing a high-performance engine, proper water pump pulley selection is essential for consistent coolant flow and belt drive reliability. The TRANS-DAPT 9604 delivers OEM-quality engineering for small block applications where original equipment specifications demand precision fit and durability.

Verify shaft compatibility and belt configuration before installation to ensure correct fit with your specific small block Chevy long water pump assembly and accessory drive system.