Jaguar / Land Rover (V8) 5.0 L Petrol Timing Tools Timing tool camshaft alignment, to lock the ring gear. To tension the VVT during the timing procedure. OEM Number: 303-1145, 303-1447, 303-1148, 303-1452, 303-1482 Application: X150 - XK (10MY), X250 - XF (10MY), X351 - XJ (10MY)