Ford 9 in. 31 Spline LSD TorqueWorm® HD Case Third Member Assembly Ratio:3.70:1 the use of 6 pinion

the use of 6 pinion gears means the stress on gears is spread over a greater surface area

you can run higher compression with these heads before the onset of power robbing detonation

These Speedmaster aluminum water pump pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 aluminum specifications and come in machined or polished finishes to suit your application

Designed for Speedmaster starters

and their latex coating conforms to minor sealing-surface irregularities for a better seal

Ford 9 in. 31 Spline LSD TorqueWorm® HD Case Third Member Assembly Ratio:3.70:1 the use of 6 pinionSpeedmaster 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 our famous TorqueWorm geared limited slip differential, 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.