This breather is fitted with our proprietary APV one-way check valve, so while internal pressures can pass through, outside air cannot be drawn through the breather and into the inlet tract of the engine.
Valve Cover Breather & PCV Valve Push-In GM Chevy Pontiac Ford Mopar Chrome 350
Chevy Aluminum Tall Finned Valve Cover+Breather & PCV Kit W/Gasket 350 Nostalgic
-12 AN Valve Cover Breather Fittings PCV Race Street Marine Racing GM LS SB BB
Chevy Aluminum Tall Finned Valve Cover+Breather & PCV Kit 350 Nostalgic
Push In Valve Cover Breather with Filter and Ford Racing Logo
