This is a brand new pump that's engineered to be better than the factory part -- and a heck of a lot cheaper as well. Factory and other aftermarket pumps have a plastic impeller, which has been known to disintegrate and send shrapnel through the engine. Not good! This re-engineered pump eliminates that problem. Supplied with a top-quality Cometic gasket. This pump fits all first- and second generation XK8/XKR 4.0 and 4.2, all V-8 S-type, All first- and second generation XJ8/XJR and 4.2 XF.