Engine Pistons Rings Set For XF Discovery 5.0 V8 AJ133 508PN This piston and ring kit is designed for 5.0L V8 DOHC naturally aspirated engines with engine codes 508PN and AJ133.The set includes 8 pistons and corresponding rings, intended for use in specific vehicle models equipped with this engine variant.Specifications: - Standard size (STD 0.00), no cylinder bore expansion required - Cylinder bore diameter: 92.50mm - Wrist pin diameter: 22mm - Ring thickness: 1st ring 1.2mm, 2nd ring 1.5mm, 3rd ring 2.0mm Compatible applications: - XF model years 2009–2012 - XJ model years 2009–2013 - XK model years 2009–2015 - Discovery IV model years 2009–2013 - Sport model years 2010–2013 Note: This kit is suitable only for 5.0L V8 naturally aspirated engines.Verification of compatibility using the vehicle identification number is recommended prior to purchase.