PCV in aftermarket valve covers

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Iowan

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So I’m looking at running some tall valve covers, and my truck has a PCV so will this just fit in the valve cover no issues or will I need to modify it? Thanks
 

bucket

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If you get covers with PVC/ breather holes, yes.
 

1987 GMC Jimmy

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If the new ones don’t have a PCV grommet, you’ll need one.
 

bucket

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Generally with aftermarket covers, one gets a PCV and the other gets a breather cap. There is a different sized grommet to fit each.
 

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