Rotor 8bt .310in 12in x 7 Sprint/Modified

The Rotor 8bt .310in 12in x 7 Sprint/Modified by WILWOOD is a purpose-built brake rotor engineered for high-performance sprint cars and modified race vehicles where thermal management and consistent stopping power are non-negotiable. This rotor exists to handle the extreme demands of short-track racing, where repeated hard braking events occur lap after lap under conditions that would overwhelm street brake components. Whether you're running a 410 sprint, 360 sprint, or modified late-model dirt track machine, this rotor delivers the thermal capacity and structural rigidity needed to maintain consistent pedal feel and stopping authority throughout extended competition runs.

The .310-inch thickness and 12-inch diameter design provide substantial mass for heat absorption while remaining compatible with WILWOOD's lightweight, modular brake systems commonly found in sprint and modified platforms. The rotor's geometry is optimized for the unique geometry of sprint car and modified brake packages, where suspension geometry and frame constraints differ significantly from oval-track stockcars. WILWOOD's 8-bolt pattern ensures secure mounting across a wide range of aftermarket hubs and spindle assemblies, while the .310-inch thickness specification indicates a rotor designed to withstand repeated thermal cycles without warping or cracking—critical for vehicles that see consistent high-deceleration events. The 4.84-pound weight keeps unsprung mass minimal, a priority for short-track competitors focused on chassis dynamics and acceleration.

Sprint car and modified racers benefit most from this rotor when paired with ceramic or carbon-metallic brake compounds rated for continuous high-temperature operation. Installation requires a WILWOOD-compatible hub or adapter with an 8-bolt pattern; verify your spindle assembly matches before purchasing. This rotor works best in brake systems engineered for dirt-track applications where airflow is abundant and rotor cooling is passive. Compatibility extends across most modern sprint platforms and modified classes that run WILWOOD disc brake kits, making this a practical upgrade for teams transitioning from stock-style rotors to premium race-spec stopping components.