Ford 9 in. 31 Spline LSD TorqueWorm® HD Case Third Member Assembly Ratio:3.70:1 Made from high quality aluminum

Made from high quality aluminum

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

and the outer housing has a slim design that allows for mounting inside of the headers

They feature aluminum construction

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

Ford 9 in. 31 Spline LSD TorqueWorm® HD Case Third Member Assembly Ratio:3.70:1 Made from high quality aluminumSpeedmaster 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.