If you get a new set of Milodon valve covers, you'll want matched breathers to go with them. These push-in style accessories are available to fit a variety of hole sizes. They're finished with a deep chrome polish; and most models include a rubber grommet.

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MILODON Valve Cover Breather Grommets for 1.22 in. Holes, Pair

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AC Delco, Slant-Edge Aluminum Push-In Air Breather Cap, Polished; Recessed Red Bowtie Emblem

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Trick Flow Valve Cover Breather, Push-In, Round, 1 in. Diameter Nipple, Steel, Chrome, Logo, Each

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