YouÕve seen the analogous piece for the XK8 and XJ8, which has sold well for good reason: it replaces a crack-prone plastic part with a bullet-proof copy in alloy. We highly recommend this as preventive maintenance. Kit includes NCE2247AD thermostat housing in alloy, AJ8-5875 thermostat cover in alloy, NCA2264BA O-ring, NCA2270AC O-ring and NCA 2270AC screw cap in alloy. Re-use your old thermostat or purchase a new OEM thermostat under JA-AJ8-6484. This kit fits all non-supercharged S-Type 4.0 V-8 up to 2002.5, or VIN M45254.