Vibrant The Classic Perf Air Filter 5in OD Conex3-5/8in Tallx6in ID Bellmouth VelocityStack10950-52Classic Filters feature a 4 ply cotton gauze filter element that allows for significantly more air flow than a stock filter while also providing excellent filtration of airborne particulate. Each filter is pre oiled and is washable and reusable. Classic Filters have a temperature rating of 225 Degrees C