The FR5s Racing Edition 4-Piston Brake Kit is a dedicated rear-wheel racing brake system developed by FeccR specifically for drag racing. It utilizes 7075 aviation-grade aluminum forged in one piece, boasting a piston area of 28.28 cm². It can be fitted with a minimum of 17-inch wheels. The FR5s also features a quick-release disc design, with options such as titanium alloy pistons, ensuring a more balanced braking force between the front and rear of the car.