502 Series Performance Heads 44 by 37.5 Valves, Pair Type 3 Make Model Year Body Type 912 and 914 engines Make Model Year Body Type Volkswagen Beetle 1968 1970 Convertible Volkswagen Beetle 1968 1977 Sedan Volkswagen Beetle 1968 1977 Sunroof Volkswagen Karmann Ghia 1968 1974 Convertible Volkswagen Karmann Ghia 1968 1974 Coupe Volkswagen Super Beetle 1971 1977 Sedan Volkswagen Super Beetle 1971 1977 Sunroof Volkswagen Super Beetle 1971 1979 Convertible Volkswagen Thing 1973 1974 Base Volkswagen Type 3 1968 1973 Fastback Volkswagen Type 3 1968 1973 Notchback Volkswagen Type 3 1968 1973 Squareback VDO Cockpit White Series Gauge works with 92 thick walls K and M to reduce the chance of cracking between the Valve seat and Plug