Rebuilt Crankshaft Damper Harmonic Balancer FITS 2004-2008 XJ8, 2007-2009 XK8 & 2009-2010 Xf, With 4.2 Naturally Asprated Engine (Does NOT Fit Supercharged Cars). The price includes a $200 core charge that you get back when you send your old part to us AJ810654 (AJ811116)