Suitable rotors for street and motorsports driving.  Features Thermal Stability Profiling for improved heat handling, Thermo-Graphic paint markings for effective heat monitoring and Kangaroo Paw ventilation which runs cooler, stronger and outperforms traditional straight vane disc rotors by up to 20%.  The 5000 series rotors are designed for the serious street driver. These 2-piece ultra-high performance rotors feature aerospace grade materials (Alumalite) for added thermal (heat) protection to your vehicle's wheel bearings, by providing greater resistance to distorion as it allows the disc to expand uniformly.