Crankshaft Damper, Aftermarket, XJ-S and XJ-12 Series III 5.3 V-12 With Multi-Rib Serpentine Belt and Marelli Ignition. Click "VIEW" for specific application information. Illustration item 1 This damper fits all XJ-S 5.3 V-12 with a multi-rib belt. Technically, this damper fits only cars with Marelli ignition, but it can be used on earlier cars as well. (You cannot use an earlier damper on a later car, however.) Marelli ignition started at engine 8S.64245. This damper does not fit 6.0-liter cars. This damper also fits Series III XJ-12 with a multi-rib belt, or after Engine 7P.59903. It is also available new as a rebuilt part (JA-EAC9693/RB) and as a genuine part (JA-EAC9693).