8411x 1. Our specialist spring maker commissioned XK120 / XK140 Early Spring for the Timing Chain Tensioner Blade/ bow . Original Reference No.  C4101 / (C2284 supercession)

NOTE: As an alternative to this crude system, we also offer a Jaguar Racing upgrade, our 'C-Type' hydraulic conversion kit. Our part number : SE822

SE822 replaces the blade and spring mechanism with the oil feed from oil spray bar outlet that is re-routed through a brass block, which then mounts an XK150 hydraulic chain damper setup for a rattle free life!