Charcoal colored carbon fiber is one of the most popular materials used in manufacturing today because of its strength and attractive looks. Proform's new Carbon-style engine dress-up products are stamped steel parts with a carbon fiber film adhered to the exterior surface giving the parts that look customers crave at a reasonable price with the strength of steel. This product includes a black crinkle Ford Oval center nut, and all the necessary mounting hardware. These 13 diameter air cleaners fit 2V and 4V carburetors, and are supplied with a 5-5/8 high Motorcraft filter element. Technical note: After installing a new air cleaner kit, always lower the hood slowly to confirm sufficient clearance visually. Minimum clearance of 4 is required from the top of the carburetor gasket area to the underside of the hood.