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Radium Engineering valve for PCV (positive crankcase ventilation) systems. Do not mistake this for a simply one-way check valve. The PCV valve's internal plunger dynamically meters the appropriate amount of crankcase vent airflow based on current engine load. Proper PCV valves prevent the "vacuum leak" that a check valve would create at low loads.

The PCV valves can be used on the outlet of any Radium Engineering Catch Can (shown above) or any related part that uses -10AN ORB threads.


Aluminum: 6061 Type-II Anodized
Sealing O-rings: FKM and Silicone
Inlet: 10AN ORB (7/8"-14 threads)
Outlet (20-0530): 3/8" Barb (9.5mm)
Outlet (20-0561): 6AN Male


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