Ford 9 in. 4in. 40 Spline Spool HD Pro Third Member Assembly Ratio:4.11:1 reducing unwanted vibrations

reducing unwanted vibrations

including most aftermarket and OEM gauges

oil leaks and producing 50% more spark than stock

They feature a sleek chrome finish with an aluminum housing and have a 100 amp capacity and wired exactly like your stock  alternator for a simple swap

and oval track racing

Ford 9 in. 4in. 40 Spline Spool HD Pro Third Member Assembly Ratio:4.11:1 reducing unwanted vibrationsSpeedmaster 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.