6 Set Pistons Rings Kit STD 84mm 11258619196 11257610297 11257610298 For 2010-2017 F21 F30 F10 X3 X4 X5 X6 N55B30 N55B30A This 6 set pistons rings kit is designed for models equipped with N55B30 and N55B30A 3.0L L6 twin-turbo engines.Constructed from materials, the pistons and rings offer performance and extended service life under normal operating conditions.The kit includes components necessary for engine assembly, such as pistons, rings, and connecting rod parts.The cylinder bore size is 84mm with ring thicknesses of 1.2mm for the first ring, 1.5mm for the second ring, and 2.0mm for the third ring.This STD 0.00 specification proper fitment without requiring cylinder boring or modifications.It is intended for use in engine rebuilds where dimensions are maintained.Compatibility covers specific models produced between 2010 and 2017, including F21, F30, F10, and variants X3, X4, X5, and X6.Installation is designed to follow standard procedures for engine reassembly.