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 .780" vented Super Alloy discs 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 Nickel Billet Dynalite 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 mounting hardware.