This engine piston rings set is compatible with Discovery IV, XF, XJ, and XK models equipped with the 5.0L V8 naturally aspirated AJ133 (508PN) engine.The set includes components corresponding to OE reference numbers 8W93-6K109-AA, 8W93-6K109-BA, 8W93-6K110-BA, and KOLBENSCHMIDT number 40104600.Specifications: - Standard bore size (STD 0.00), no cylinder overbore required - Cylinder bore diameter: Φ92.50mm - Wrist pin diameter: Φ22mm - Ring thickness: 1st ring 1.2mm, 2nd ring 1.5mm, 3rd ring 2.0mm - Engine displacement: 5.0L (5000cc) V8 DOHC naturally aspirated - Engine code: 508PN / AJ133 Package includes: Piston rings for 8 cylinders Compatible vehicle models and years: - Discovery IV: 2009–2013 - Sport: 2010–2013 - XF: 2009–2012 - XJ: 2009–2013 - XK: 2009–2015