Direct Mount Low Profile Differential Air Cleaner. Keep debris from entering your axle and contaminating your fluid. Will mount to the manufacturer's existing "breather" hole in the rear end. Billet aluminum cleaner body is machined from a solid piece of billet 6061-T6 aluminum. Filter element is made of a self-cleaning polypropylene and keeps debris from entering the differential. In most cases no tools are necessary. Low Profile is used where room does not allow for the full size or you just want to keep everything close to your axle.