Inner Vented Gas Cap For Pop-Open Style Gas Cap Covers 1967-1970 Mercury Cougar, 1967-1973 Ford Mustang, 1966-1970 Ford Falcon More ITEM # FM-EG012E OE # C7AZ-9030-A Replacement inner cap for cars with the pop-open style gas cap cover Vented cap not to be used with evaporative emission equipped cars 1970 and newer Was: MSRP: Now: $22.00 View Details