ISR Performance Rear Differential Mount Support Brace 2013-2021 BRZ / 2013-2016 FRS / 2017-2021 GT86

The ISR Performance Differential Brace is designed to stabilize and support the rear differential by reducing excess movement during aggressive driving or hard launches. Constructed from high-strength steel, this brace reinforces the factory differential mounting points, minimizing flex and improving power transfer to the wheels. By reducing differential movement, it enhances driveline response, improves traction, and reduces stress on other drivetrain components. This makes it an ideal upgrade for performance-oriented builds or vehicles frequently driven in high-load conditions such as drifting, track racing, or spirited street driving.