***2021 PRI Featured Product Award Winner*** Premium Lightweight Quick Change Gears are drilled to reduce rotating weight, to deliver the most power to the ground. 8620 Alloy Steel stands up to the demands of high horsepower engines and large tires. REM polished surfaces and Crown Shaved Profile teeth reduce friction, run cooler and longer and deliver maxiumum tooth contact. Lightweight gears are perfect for limited power such as crate engines to give quicker spin up time and maximum power transfer. Suitable for 410 Sprint Cars, 360 Sprint Cars, 305 Sprint Cars, Modifieds, Open Late Models and Crate Late Models. Polished surfaces run quieter, making for an excellent gear option for a street quick change rear end. Available in a large number of gear ratios to fine tune to the track conditions or your street applications. Find the Competitive Advantage in a Durable, Lightweight Quick Change Gear With the limits on today’s racing engines, it’s hard to find an advantage under the hood. But you can make the most of that horsepower by reducing weight in the driveline. Competition driveshafts and lightweight ring and pinions can reduce rotating mass, making starts quicker and more of that power making it to the rear wheels. But there’s one more place where you can get an advantage: the rear end quick change gears. Track Tested 8620 Steel Stands Up to The Competition High demands are placed on the quick change gears of rear ends but Speedway Motors has found a lightweight answer. Tested in race action for a full season before release, our Premium Lightweight Quick Change Gear Sets are drilled for weight reduction, yet constructed of durable 8620 Alloy steel in a perfect balance of strength and weight. Our lightweight gears are perfect for high-horsepower applications with large tires. Less Weight and Reduced Friction Surfaces Means More Power to the Ground Less rotating mass means more power goes to the tires