Your Corvette positive crankcase ventilation valve or PCV valve is a small spring-loaded valve usually located on your Corvette's valve cover. A Corvette's positive crankcase ventilation valve contains a specific orifice size to restrict the amount of air that's pulled from the crankcase into your Corvette's intake manifold. Your Corvettes PVC valve has an effect on the fuel mixture much the same as a vacuum leak but controlled within certain limits. Eckler's Corvette has positive crankcase ventilation valve or PCV valve to get your C2, C3 or C4 Corvette working right and performing its best. Whether your Corvette needs a PVC valve to pass emissions or smog testing or simply the crowning detailed part on your engine restoration, Eckler's has the PVC valve you need.