REBUILT SUPERCHARGER. FITS 2004-2009 XJR 4.2, 2003-2008 S-TYPE R 4.2, 2003-2006 XKR 4.2, 2007-2009 XKR 4.2 & 2009-2010 XF 4.2 SUPERCHARGED. The price includes a $250 core charge that you get back when you send your old part to us. Core charge note: Your core must be undamaged and in rebuildable condition or your core charge will not be refunded. Replaces AJ87174 (AJ89855)