Brembo 15-18 M3 Excl CC Brakes Rr GTS BBK 4Pis Cast 380x28 2pc Rotor Drilled-Black HA

This Brembo GTS Big Brake Kit for the rear of your 2015-2018 BMW M3 includes everything you need to significantly upgrade your braking system. You'll get a pair of Brembo 4-piston calipers, two 380x28mm two-piece rotors that are drilled for heat dissipation, and all the necessary hardware to get them installed. This kit is designed to replace your factory rear brakes with a more robust setup, offering a notable improvement in stopping performance and heat management, especially during spirited driving or track use.

The calipers are cast from aluminum for a good balance of strength and weight, finished in a sleek black. They house four pistons each, which apply more even pressure to the brake pads for better contact and more consistent braking force. The two-piece rotors are a key feature here; the cast iron braking surface is separate from the aluminum hat. This design helps reduce weight and allows for better thermal management, as the heat from the braking surface is less likely to transfer directly to the hub assembly. The drilled pattern on the rotors helps to vent gases and heat away from the pad surface, which can prevent brake fade and maintain optimal performance under heavy use. This kit is a substantial upgrade for M3 owners looking for a serious improvement in their car's ability to slow down.

When installing this kit, it's important to follow the manufacturer's instructions carefully, as brake system modifications can be complex. Ensure you have the correct tools and consider having a professional mechanic perform the installation if you are not experienced with brake system work. Proper bedding-in of the new pads and rotors is also crucial to achieve the best performance and longevity from this Brembo kit.