Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Edlebrock Valve Cover Breathers???
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Old 11-25-2012, 06:40 AM
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It's only necessary if you don't want the fumes.

PCV valves are emissions related, it doesn't "help" the engine to have it. As a matter of fact burning oil fumes in the combustion chamber isn't a positive for horsepower and performance.
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