Developed from years of racing and tracking the E36 and E46, these gas-slotted rotors provide a crucial oulet path for gas. This gas can build up between the pad and the rotor surface, resulting in a slight delay when pressing your foot on the pedal. These are a direct-replacement rotor, in the same dimensions as the stock rotors, and built to an exclusive Turner Motorsport design. Anti-corrosion paint is applied to the rotor hat and the vane area to prevent rust.