Slant-Edge Air Cleaners are the perfect way to complete your dress-up look in premium Slant-Edge style. Whether you have Slant-Edge valve covers, or a set from a different series, these air cleaners with prominent raised or recessed emblems will bring your engine look together in head turning fashion. They are supplied with a genuine 2.625 inch Motorcraft air filter elements P/N FA612R for maximum airflow. The air cleaner lid attaches to a short stud that is screwed into the center of the carburetor. Lid has a threaded boss on the underside, and is simply spun into place by the installer. Each kit is supplied with necessary mounting hardware. Technical Note: After installing a new air cleaner, always lower the hood slowly to confirm sufficient clearance visually. Minimum clearance of 3.75 inches is required from the top of the carburetor gasket area to the underside of the hood. The air cleaner bases are recessed for a low profile appearance, maximum performance and hood clearance. Patent Pending.