4pcs Piston & Ring Set for R55-R60 Cooper Countryman Paceman models with N12 and N16 engines.This set is designed for engine replacement applications, compatible with vehicle production years from 2006 to 2016.Constructed from aluminum, the pistons offer and resistance to wear.The set includes four complete piston and ring assemblies, each with a standard bore size of 77 mm, matching specifications for fitment.Engineered to support efficient combustion and consistent performance, these components are suitable for use in 1.2 x 1.5 x 2.0 engine configurations.The design supports straightforward installation during engine rebuilds, making it suitable for both routine maintenance and performance restoration.Intended as direct-fit replacement parts, this piston and ring set contributes to sustained engine and longevity.This is a non-OEM replacement part.Any trademarks or model numbers cited are used strictly to demonstrate compatibility.