The Brembo big brake kit for 2009–2012 SL550 (R230) front applications features six-piston cast calipers and 355×32mm two-piece drilled rotors in black. Described as a front GTS BBK, the kit's two-piece drilled rotors and multi-piston calipers match the product specification to replace the factory front braking hardware with the larger components detailed.
Brembo 09-12 SL550 (R230) Front GTS BBK 6 Piston Cast 355x32 2pc Rotor Drilled-Black HA