The R1 Concepts drilled black brake rotor for 1998–2010 Lexus GS300 rear-right is listed for the rear-right position across those years. The product description notes a drilled face and black finish consistent with the cataloged application, making it appropriate for replacement or service. Confirm year and side to verify compatibility with your GS300.

R1 98-10 Lexus GS300 Rear Right Drilled Black Brake Rotor