Each PCV valve is a direct-fit replacement that replaces OE damaged units to provide proper air flow from the crankcase to the intake manifold. Every PCV valve is designed to help remove moisture from the oil. In return, it can prevent severe sludge build up and oil leaks. This can prevent corrosion from appearing in the engine and any inherent failure issues. Each PCV valve is constructed to deliver optimum airflow performance to ensure continual evacuation of gases from inside the engine. Manufactured with the highest grade materials for prolonged life and superior performance.