JaguarÕs troubles with timing chain tensioners are well documented. This kit provides everything required to update to the latest specification metal tensioners. We believe this is the most complete kit available. Included are upper and lower timing chain guides, tensioners and timing chains, crankshaft seal, timing cover seals, cam cover gaskets, spark plug seals, timing module O-Rings and updated shoulder bolts for the upper tensioners. (In other words, it is Kit 01-HTK100 with gaskets and seals.) This kit fits V-8 engines in the S-Type, XJ8 and XK8 up to 9810290000, which were produced during 1998. Click on the Documents tab to learn more about V-8 Engine Number locations. This kit is assembled at time of order; it will not show as being in stock.