Not Ranked
Not necessary, but they certainly help prevent oil from getting out the breathers and making a mess on top of your valve covers. Lack of baffles is my number one pet peeve with aftermarket valve covers, I have added them to all my aftermarket covers that didn't have them.
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In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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