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 3" Motorcraft air filter elements (part no. 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 3-3/4" 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.