[355.089.86]Peformance Fricion brake rotor BMW 135i ZR31 right rear replacement disc assembly

All Performance Friction Discs adhere to the following specifications:

 

- High Carbon Alloy with copper and molybdenum for high temperature strength and durability.

- Vanes turned OD and ID for balance to reduce thermal warping and vibration.

- Thickness variation less than .0003 inches and Run out less than .001 inches reduces Pulsation and Vibration.

- 47 or more vanes for superior thermal capacity.

- Aircraft quality heat treatment for micro structure alignment and durability.

- Surface finish less than .7 microns.

- 100% measured and inspected to meet strict tolerance specifications.