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The GiroDisc slotted front ring for 2018 and newer Subaru WRX STI is a direct-fit replacement ring for the WRX STI front rotors. It restores the slotted braking surface used to help clear pad deposits and evacuate gases during braking, matching the front rotor interface specified for STI models beginning in 2018.
GiroDisc 2018+ Subaru WRX STI Slotted Front Rings
