Ford 9 in. 4in. 40 Spline LSD TorqueWorm® HD Pro Third Member Assembly Ratio:5.43:1 you can count on Speedmaster

you can count on Speedmaster for coolant temperature sensors

Pulleys can be replaced with pulleys of the same or different diameters

Speedmaster pilot bearings c-clips are engineered with precision to provide superior quality

Most Speedmaster intake manifold gaskets have Printoseal construction

which reduces the friction

Ford 9 in. 4in. 40 Spline LSD TorqueWorm® HD Pro Third Member Assembly Ratio:5.43:1 you can count on SpeedmasterSpeedmaster 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.