Brembo 15-18 M3 Excl CC Brakes Rr GT BBK 4Pis Cast 380x28 2pc Rotor Slotted Type1-White

If you're looking to significantly upgrade the stopping power on your 2015-2018 BMW M3, this Brembo GT Big Brake Kit for the rear is a serious consideration. This kit is designed to handle the demands of spirited driving and track use, offering improved performance when you need it most. It replaces your factory rear braking components with a robust, high-performance setup that’s built to last.

At the heart of this kit are the 4-piston cast aluminum calipers, which are lighter and stronger than cast iron, helping to reduce unsprung weight. These calipers grip a pair of 380x28mm two-piece rotors. The rotors are slotted with Brembo's Type 1 pattern, which helps to dissipate heat and gas buildup, keeping the pads in consistent contact with the rotor surface for more reliable braking, especially under heavy use. The two-piece design allows for better heat management and can make rotor replacement simpler down the line. The calipers come finished in a clean white color, adding a visual upgrade to your wheels.

This kit includes everything needed to install the rear big brake system, providing a comprehensive upgrade. When installing a big brake kit like this, it's always a good idea to inspect your brake lines and consider upgrading them to stainless steel braided lines for optimal pedal feel and durability. Ensure you follow the manufacturer's installation instructions carefully for proper setup and bleeding of the brake system.