4 Set +0.5mm Piston & Ring Kit 11257566019 11257540609 11257566479 For 2006-2016 N14 Turbo Cooper Countryman N14B16A This piston and ring kit is designed for compatibility with N14 engine variants used in specific vehicle models from 2006 to 2016.The set includes four pistons with an oversize of +0.5mm, along with corresponding piston rings.Components are engineered to meet specifications for fitment and function.The kit supports rebuilds and replacements where increased cylinder bore dimensions require oversized pistons.Part numbers included are 11257566019, 11257540609, and 11257566479.Intended for use in N14B16A engine applications. Compatibility Note: This is a third-party replacement component.Brand and model references are included solely to indicate fitment.