Brembo 04-08 S4/06-08 A4 Rear GT BBK 4 Piston Cast 2pc 345x28 2pc Rotor Slotted Type1-Black

The 345x28mm two-piece rotors in this Brembo GT Big Brake Kit are a key upgrade for the rear of your Audi S4 or A4. This kit is designed to give you more stopping power and better heat management than the factory setup. The calipers themselves are a four-piston design, which means they apply more even pressure across the larger rotor surface, helping to slow your vehicle down more effectively, especially during repeated hard braking events.

Brembo uses cast iron for the caliper bodies, which is a strong material that holds up well to the heat generated during braking. The two-piece rotor construction is notable because it allows the rotor ring and the hat to expand and contract independently as they heat up and cool down. This helps to prevent rotor warping and cracking over time. The Type 1 slotting pattern on the rotors is designed to help sweep away dust and gas that can build up between the pad and rotor surface, maintaining consistent friction and improving wet weather performance.

This kit includes everything you need to upgrade your rear brakes. You'll get the calipers, the two-piece rotors, and the necessary hardware to get them installed. When you're looking to improve your car's braking performance significantly, especially if you plan on tracking the car or driving it hard, a big brake kit like this from Brembo is a solid choice. It’s a substantial upgrade that makes a real difference in how your car feels and performs under braking.