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Eman · 07-31-2015, 09:25 AM

YES! A PCV system requires a breather to be a ventilation system. little or no vacum under full throttle which is when the engine is making the high amount of back pressure.

07-31-2015, 09:25 AM	#2
Eman Member Join Date: May 2014 Location: E TN Posts: 442 Likes: 14 Liked 105 Times in 60 Posts	Re: Valve Cover Breathers YES! A PCV system requires a breather to be a ventilation system. little or no vacum under full throttle which is when the engine is making the high amount of back pressure.