Billet Narrow Dynalite 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 11.75" x .350 Scalloped / Drilled steel rotor and a newly designed dynamic mount rotor axle clamp, offer the lowest rotating weight available for Sprint racing. • The lightweight advantages of Wilwood Sprint rotors are fortified with the high durability, long wear, and superior heat control properties of advanced materials. • Newly redesigned Nickel Billet Dynalite Radial mount calipers with BP-40 pads, produce superior stopping power and consistent fade-free response. Kit includes Axle Clamp with Dual Mount Rotor Adapter with T-nuts, radial mount bracket assembly and mounting hardware.