Universal Marine Engine Flame Arrestor 5-1/8in Flange/8in ID x 9in OD/2.75in Height (KNN59-3364)Breathe easy and boost performance with the Universal Marine Engine Flame Arrestor 5 1 8in Flange 8in ID x 9in OD 2. 75in Height from K&N. This high flow replacement air filter is designed to increase horsepower and acceleration while providing outstanding filtration. Unlike disposable paper filters, K&N filters are washable and reusable so you buy once and never worry about replacements again. Features Multi layered oiled cotton gauze filtration