New Clough and Wood brand engine cylinder head gasket, part number DHG999 or JLM11088 or NBC2520AB, made in the United Kingdom.  This fits:

• Jaguar XJS 4.0L and 3.6L AJ6 engines 1984-9/1994
• Jaguar XJ6 3.6L and 4.0L AJ6 engines 1987-11/1994