Billet Narrow Dynalite Radial Midget Inboard Kit Features: A fully engineered bolt-on brake system for sprint car quick change rears with 3.50 x 38 splined axles. With a 10.50" x .350" drilled steel disc and a newly designed dynamic mount rotor axle clamp, are the lowest rotating weights available for Sprint racing. The lightweight advantages of the Super Alloy rotor are fortified with the high durability, long wear, and superior heat control properties of advanced materials technology. Newly redesigned Type III hard anodize Billet Dynalite Radial mount calipers with BP-40 pads, produce superior stopping power and consistent fade-free response. Kit includes Axle Clamp with Dynamic Mount Rotor Adapter assembly with T-nuts and mounting hardware.