Perfect for drag racing, the US Gear COMPETITION(PRO) gears offer high strength and light weight with the necessary muscle to tame huge amounts of torque on the starting line. Run after run, they take a beating and come back for more! Competition gears use 9310 grade steel. US Gear Ring and Pinion Ford 9" Gear Large Pinion 5.83 Ratio *Image is Representative, Actual Item May Vary