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The Brembo rear GT big brake kit for 2006–2009 Porsche 997.1 GT3 is a rear axle upgrade featuring four-piston cast calipers paired with 380×28 mm two-piece rotors. This variant specifies drilled rotors finished in black and includes the rotor and caliper assemblies sized for the rear axle, matching the 997.1 GT3 application listed in the source.
Brembo 06-09 997.1 GT3 Rear GT BBK 4 Piston Cast 380x28 2pc Rotor Drilled-Black
