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The GiroDisc 350mm slotted front ring for Porsche 911 Carrera S, 4S, and GTS (991.1) is a direct-fit replacement ring matched to factory front rotor diameter. Intended for service replacement or rotor refreshes, the slotted surface helps clear pad deposits from the contact area and maintain consistent pad engagement and braking response across varied driving conditions.
GiroDisc Porsche 911 Carrera S/4S/GTS (991.1) 350mm Slotted Front Rings
