Ford SB 289 302 351w Aluminum Complete Serpentine Engine Pulley Kit [Polished] but both factors can be

but both factors can be equally important in a race car

They're 40 percent lighter

The Speedmaster Serpentine Pulley Kit is engineered to offer a balance of performance and value for high-performance street cars and race car applications

Speedmaster cylinder head valvetrain kits offer a comprehensive solution for revitalizing your engine's cylinder heads

As the horsepower in your performance vehicle goes up so does the strength of the read end housing

Ford SB 289 302 351w Aluminum Complete Serpentine Engine Pulley Kit [Polished] but both factors can beThe successful formula of offering a complete engine drive accessory kit has now been applied to the Serpentine with Speedmaster pulley systems. Superior engineering, high tech styling, and quality components are combined into a precision machined compact package. Speedmaster pulley systems work with any type of cylinder head or manifold configuration.