Ford 9 in. 31 Spline Spool HD Case Third Member Assembly Ratio:3.00:1 Speedmaster piston rings are designed

Speedmaster piston rings are designed to stand up to the rigor of racing and high-performance street use while providing a long-lasting life

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Designed to bolt on to our aluminum center sections and used with our various housing end applications

Speedmaster aluminum crankshaft pulleys are manufactured from 356 aluminum that is heat-treated to T-6 specs

These Speedmaster perimeter plates employ multiple injection points to ensure that a perfectly atomized

Ford 9 in. 31 Spline Spool HD Case Third Member Assembly Ratio:3.00:1 Speedmaster piston rings are designedSpeedmaster Ford 9 in. third member assemblies are designed to help you get that horsepower to the ground. They include aluminumn thru bolt design center section, as well as a forged chromoly steel spool, 1350 series yoke, daytona pinion support, and gear ratio. Whether you're assembling a daily driver, street rod, or race car, Speedamster's third member assemblies will provide the durability that your vehicle deserves.