Allstar Performance Crankshaft Pulley is designed for Small Block Chevy engines with a short water pump, featuring a two-groove, 4.75-inch diameter configuration. Constructed from durable aluminum with a gray anodized finish, it provides strength while maintaining a lightweight design. The pulley is compatible with 1/2-inch wide performance-grade V-belts, allowing reliable operation with high-performance mechanical fans. Its 1:1 ratio ensures efficient power transfer, and the wider grooves minimize slippage under demanding conditions. When paired with a power steering pump using a 6-inch pulley, this setup delivers approximately 30% RPM reduction for improved efficiency and balanced performance. Hardware is included for installation.
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