2005-2016 Mustang 4.6/5.0 V6 Billet Aluminum Black Valve Cover Oil Cap Breather

Details:

This auction is for a 2005-2016 Mustang GT Coyote 4.6L/5.0L V6 Billet Aluminum Black Valve Cover Oil Cap Breather. Item shipped as shown. What does a valve cover breather do? Simply put a valve cover breather ventilates the crankcase from pressure just like the factory PCV system. The valve cover breathers lets the engine find its own pressure equilibrium without a positive scavenging effect. Do I really need a breather if I already have a factory PCV? A PVC has to have a air supply to the crank...

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