Ford 9 in. 4in. 40 Spline Spool HD Pro Third Member Assembly Ratio:4.11:1 These combinations start with a

These combinations start with a reliable Speedmaster 9

Blades and polarity of the wiring can be reversed and it becomes a pusher mounted pushing air through the radiator

reducing unwanted vibrations

They produce a simulated trigger signal that fires the ignition just as if the engine were running

oil leaks and producing 50% more spark than stock

Ford 9 in. 4in. 40 Spline Spool HD Pro Third Member Assembly Ratio:4.11:1 These combinations start with aSpeedmaster 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.