Available in 4 In Form Sizes: S(52-55.5cm), M(55.5-59cm), L (59-62.5cm), XL (62.5-65cm). XL offered in limited colors. * In-Mold construction * 15 Super Cool vents with Weatherstrip vent shield and Stack Vent * Compatible with all after market TuneUps systems * Compliance: ASTM F2040/CE EN1077