GP320 Right/Left Rear Brake Kit

The GP320 Right/Left Rear Brake Kit is a complete rear brake assembly designed for high-performance sprint car applications. This kit combines precision hydraulic stopping power with proven race-tested components, delivering the caliper clamping force and rotor heat dissipation required for repeated hard braking cycles in competitive driving environments.

The kit features a 4-piston caliper architecture that distributes braking load across a wider surface area, reducing pad wear and improving modulation under trail-braking conditions. The 10.500-inch drilled and scalloped steel rotor accelerates heat shedding during extended braking, critical for maintaining consistent pedal feel lap after lap. The 3 x 46 spline sprint car hat in gray anodized aluminum provides a lightweight interface for hub mounting while resisting corrosion from salt and moisture exposure common at racing venues. Bidirectional fitment (right/left configurations) simplifies inventory management for teams operating multiple vehicles or rebuilding brake systems mid-season.

This brake system addresses the needs of sprint car racers, fabricators, and performance shops seeking OEM-spec or upgrade-level rear brake solutions. Teams transitioning to new chassis or upgrading from worn systems will find this kit's comprehensive design eliminates the need to source caliper, rotor, and hat separately. The 7.5-pound assembly weight is typical for rear-axle brake packages and reflects the material density required for thermal stability under race conditions.

Sprint car brake system choices vary by class rules, track conditions, and driver preference. Four-piston calipers have become the performance standard because they offer superior pressure distribution compared to single-piston designs, reducing lock-up risk and improving trail-braking precision on tight oval courses. Drilled and scalloped rotors are favored in racing over solid designs because the drilled geometry reduces unsprung weight while scallops provide cooling channels that prevent thermal fade during sustained braking. Buyers should verify compatibility with their specific hub configuration and class regulations before installation.