EBC Premium Front Rotors (308x30mm) 97 99 Ford F250 inc Super Duty 4.6 2WD Rear Wheel ABS. EBC RK Series Premium OE Replacement Plain Brake Rotors by EBC. Sold In Pairs. This replacement brake rotor is sized and shaped to OE factory dimensions with the strictest quality controls and machined to be within extremely tight tolerances of less than 0. 05 millimeters. High quality "gray" iron meets or exceeds factory original specifications regarding thermal buildup, brake noise, vibration, and wear. The anodized layer is designed to disappear in the area that the brake pads contact the rotor. Features: Sized and shaped to original equipment specifications with extremely tight tolerances Designed to meet or reduce factory levels of heat buildup, brake noise, vibration, and wear Recommended by EBC for use with EBC Ultimax and Yellowstuff pads Black GEOMET and NITROTHERM anti corrosive finish Recommended by EBC for normal street driving, high performance street driving, truck or SUV use, drifting, and short track runs High quality "gray" iron features a higher carbon content to reduce brake shudder, heat cracking, and high frequency vibrations which cause squealing EBC recommends a 500 mile break in period with lighter braking application Benefits: Perfect for non aggressive driving Ensure quiet operation Offers low dust and long pad life More resistant to warping or cracking Why pay dealership prices that are marked up 100% when you can purchase EBC high quality Premium OE Replacement Rotors for less? Unlike cheaper, inferior replacement rotor that may look identical to original equipment, EBC builds these to match original factory dimensions and machines them to extremely tight tolerances. But they did not stop there. EBC has applied their engineering expertise to create an iron compound that exceeds the quality of most original material blends, so these rotor actually improve on factory levels of heat buildup, brake noise, vibration, and wear. A higher percentage of carbon and silicone is present which leads to the formation of graphite during the curing process. When graphite is present, the rotor itself takes on qualities of a denser, softer material. Heat is more evenly dispersed to reduce warping, cracks are less likely, and vibration related noise is greatly reduced. Premium OE Replacement Rotors is anodized for corrosion resistance, and rotor should be fully ready for performance driving after a 500 mile break in period.