Compbrake has been providing Powervane Racing Rotors to Rally and Endurance Race cars for over 15 years. Proven and tested by hundreds of cars ranging from World Rally Cars, Circuit Racing Saloon Cars, Single Seaters, Mitsubishi Evos and Subaru/Cosworth track day cars. Powervane Racing Rotors are manufactured to ISO 9000 standards. Each casting of our Rotors is subjected to stringent quality controls. This includes sample testing and random batch testing to avoid potential problems due to internal and external blowholes, cold shots, sand inclusions and other defects to provide the highest quality. Powervane Rotors offer the ultimate in disc brake technology, internally vented with curved vanes, designed not to deteriorate, warp or crack under extreme braking conditions. This unique design.