High-performance StopTech AeroRotor replacement ring designed for Big Brake Kits (BBK). This is a right-hand side, slotted rotor ring featuring patented AeroVane paddle design for optimized airflow and superior cooling. Specs: 380x35mm. The kit follows a 10-bolt mounting pattern and is intended for use with existing StopTech aluminum hubs. Included in the package: 1x Slotted AeroRotor Ring (Right Side) P/N: 31.846.1102.99. Note: Hardware kit (bolts/washers) is typically sold separately or should be reused if within service limits.