Dynapro Radial Sprint Inboard Kit Features: A fully engineered bolt-on brake system for sprint car quick change rears with 3.00 x 46 splined axles. With titanium or Super Alloy.810 vented discs and a newly designed dynamic mount rotor axle clamp, are the lowest rotating weights available for Sprint racing. The lightweight advantages of the titanium rotor are fortified with the high durability, long wear, and superior heat control properties of advanced PolyMetallic coating technology. Forged billet DynaPro radial mount calipers with Composition Metallic pads, produce superior stopping power and consistent fade-free response. Kit includes Axle Clamp with Dynamic Mount Rotor Adapter assembly with T-nuts and Radial Mount Bracket and mounting hardware.