afe Magnum FLOW Custom Air Filter 20 IN L x 20 IN W x 5.82 IN H w/ Expanded MetalMagnum FLOW Round Racing Air Filter w Pro GUARD 7 Media features seven layers of hybrid media for maximum protection. The patented combination of oiled cotton gauze paired with synthetic material allows this media to thrive in the dustiest environments and is targeted toward offroad or rural aplications. aFe POWER performance air filters use a rounded, evenly spaced pleat design which allows for more usable filter surface area, providing increased