PerfectStop Premium brake rotors offer Original Equipment fit, form and function. They are built in our ISO certified facilities and meet SAE J431 for automotive grey iron castings. In addition to offering superior stopping power, all non-friction surfaces are coated with Armor-Plate anti-corrosion coating, for a rust-free look behind todays open wheels. The Power-Vent vanes provide improved brake cooling, decreased fade and smooth braking. Braking surface has Cross-Cut surface finish for improved pad seating and break-in. PerfectStop Premium brake rotors are precision engineered for reduced vibration and superior stopping power.