The blistering under-bonnet heat of an XJ-S has a nasty habit of cooking things like wiring and cooling hoses. We therefore highly recommend regular inspection of the fuel hoses as well. If they are no longer flexible, replacement would be prudent. This hose fits 1981 to 1991 XJ-S HE V-12, VIN 105048 to 179739 and is installed between the fuel rail and the outlet fuel pressure regulator. It is a quality aftermarket hose made in the USA. The originals are no longer available from Jaguar.