Allstar Performance Water Pump Pulley, engineered for Small Block Chevy engines with a short water pump, features a two-groove, 4.75-inch diameter design. Made from lightweight aluminum with a black anodized finish, it provides strength and durability while resisting wear. The pulley has a 1:1 ratio and accepts 1/2-inch wide performance-grade V-belts, ensuring reliable operation with industrial-grade belts. Its wider grooves help reduce belt slippage, especially when paired with high-performance mechanical fans. When used with a power steering pump equipped with a 6-inch pulley, this smaller diameter setup delivers about a 30% RPM reduction for improved efficiency and balanced engine performance.
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