Piston Rings Kit STD Φ89mm FOR M5 M6 X5 X6 M E70 F10 S63B44 Package Includes: 8x Piston Ring Sets (Standard Size) OEM Reference Numbers: 11257823262 11257823263 11257823264 Compatible Vehicles: Designed for vehicles with the following chassis and model years: M5 (F10) 2011–2017 M6 (F06, F12, F13) 2012–2018 X5 M (E70) 2009–2013 X6 M (E71) 2009–2014 Engine Application: S63B44 4.4L V8 Twin-Turbo engine Installation Details: This piston ring set is designed for a standard cylinder bore diameter of 89.00mm.Installation requires removal of the cylinder head and oil pan to access the piston assemblies.Ring gaps must be positioned according to manufacturer specifications, and taper or twist orientation must align correctly with the piston ring lands.Apply engine oil-compatible lubrication when installing rings into piston grooves and during piston insertion into the cylinder bore.