Reproduction power brake booster filter for the Midland brake booster used on the 1967-68 Mercury Cougar or Ford Mustang. The Midland booster actually provided better stopping power than the later 1969-70 Bendix booster. The down side is that you will be lucky to get 10 years out of the Midland booster as they are not nearly as reliable of a design as the Bendix unit.
Ford part number C3TZ-2A346-B,