High-performance StopTech AeroRotor replacement ring designed for Big Brake Kits (BBK). This is a right-hand side directional slotted rotor featuring patented AeroVane optimization for increased airflow and superior cooling. Dimensions: 355x32mm. The package includes: 1x Replacement Slotted Rotor Ring (P/N 31.737.1101.02), 1x Mounting Hardware Kit (P/N 89.000.0002) including 10 drive pins, 10 washers, and 10 bolts for attachment to the aluminum hat.