PerfectStop™ Premium brake drums 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 today’s open wheels. PerfectStop™ Premium brake drums are precision engineered for reduced vibration and superior stopping power.