Copper/steel Payen head gasket for MINI. Suitable for all large bore modified engines. 3.4cc compressed volume. THE standard for years has been the cooper head gasket for an A-Series motor. The most commonly used has been this "AF460" designated version. The first of them actually had an asbestos inner core. The modern AF460 now has a environmentally friendly version, but it's still the famous "Copper Head gasket", Will fit a Mini , Sprite and Midget.