Pulley Kit 20% Red. SBC Long Water Pump

The AFCO Racing Products Pulley Kit 20% Red. SBC Long Water Pump is a precision-engineered serpentine accessory drive solution built for small-block Chevy marine and performance engines. Built by anglers and boaters who understand that reliable cooling and consistent water pump performance are non-negotiable when you're hours from shore, this pulley kit delivers the overdrive ratio your engine demands for optimal thermal management and electrical system output. The 20 percent reduction ratio increases water pump speed relative to crankshaft rotation, ensuring robust coolant circulation in high-demand marine applications.

Constructed from aircraft-grade aluminum with a polished finish, the Pulley Kit accommodates a single-groove V-belt configuration and is engineered specifically for long-water-pump mounting on small-block Chevy platforms. The aluminum construction keeps rotating mass minimal, reducing parasitic drag on the engine while the polished surface resists corrosion—critical in salt water and humid marine environments. This 20 percent overdrive allows the water pump to operate at higher speeds, pushing coolant more aggressively through the block and head passages without increasing crankshaft speed or fuel consumption.

Boaters running high-output small-block Chevy engines—particularly those in warm climates or extended operating cycles—benefit most from this overdrive pulley setup. The kit is designed for long-water-pump SBC configurations and ships ready to install; proper belt tension and alignment ensure years of dependable service. Weighing 5.07 lbs and compact enough to fit standard engine bays, this AFCO Racing pulley combines OEM-grade durability with aftermarket engineering that keeps your cooling system in command when the heat is on.