WinStop™ Plain Vented Front Brake Rotor (WS246428) by Winhere Brake Parts®. Quantity: 1 Per Pack. WinStop® brake rotors are designed to match OE in fit, form and function. The castings for these brake rotors are produced in our award-winning foundries and machined to exact standards in our state-of-the-art automated facilities using the latest CNC machines. The rotors are computer mill balanced to provide a smooth braking performance and come with a non-directional finish. The anticorrosion coating and OE matching vanes deliver the ultimate long-lasting, rust-free surface and excellent cooling characteristics.