Quote:
Originally Posted by cypressbog
So, does the flame arrestor have a one way valve inside to prevent possible backfire flame from entering inside the valve cover?
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No. It's free flowing both directions. It appears to have metal "louvers" (probably a series of them) which apparently block a backfire from entering the valve cover. It's visible from the valve cover end. I've never looked at one from the carb end. Some other Chevys (Corvettes, etc.) used a screen-like dome filled with a metal mesh which I believe was inside the air cleaner.