The Brembo big brake kit for 2006–2011 GS300 front applications pairs six-piston cast calipers with 355×32mm two-piece slotted rotors in black. Presented as a front GTS BBK, the kit's two-piece rotor construction and multi-piston calipers are specified to directly replace factory front components with larger braking hardware as noted in the product description.
Brembo 06-11 GS300 Front GTS BBK 6 Piston Cast 355x32 2pc Rotor Slotted Type1-Black HA