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This closed emissions chrome oil cap with an elbow and Autolite Logo is an exact reproduction part for your 1968-1971 Mustang. It features three filters, an Autolite logo, a plastic 90 degree PCV elbow, and is chrome plated. This twist-on style Mustang oil cap is used on closed emission Mustangs and does not require a grommet. Simply twist the Mustang oil cap into the twist-on hole on the valve cover and get back on the road in no time. The PCV elbow is included but not installed for those wanting to re-use their original metal elbow.