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The GiroDisc slotted rear ring for the Porsche 911 GT3 Cup (991) replaces the rear braking ring with a slotted surface tailored to cup applications. Slots help maintain pad contact by shedding debris and brake gas, supporting consistent slowing in repeat-stop scenarios. This ring is specified explicitly for 991 GT3 Cup rear rotor setups and matches that rotor architecture.
GiroDisc Porsche 911 GT3 Cup (991) Slotted Rear Rings
