The A.I.R. Check Valve is an emission control device that allows air into the exhaust system to help burn pollutants before they reach the atmosphere. Dorman's A.I.R Check Valve is constructed to withstand the extreme heat of the exhaust manifold and function properly every time. Product Features:A necessary replacement item for passing inspection in certain statesDirect replacement for a proper fit every timeDurable metal construction helps to withstand extreme temperaturesQuality-tested to ensure trouble-free installation and durability
