4pc set STD Piston and Rings kit with 87mm piston diameter and 22mm piston pin is designed for 2.3L engines in select vehicle models.OEM number EJ7Z6108E, also compatible with EJ7Z 6108 A, EJ7Z6108A, EJ7Z 6135 A, and EJ7Z6135A.This standard 0.00 specification piston does not expand during , helping maintain consistent cylinder compression and engine performance.The set includes four pistons and a full set of piston rings, providing all necessary components for installation.Engineered for compatibility with 2015–2019 Focus, Mustang, and MKC models equipped with the 2.3L engine, this kit supports under regular driving and moderate performance conditions.Constructed to meet standard material and emissions requirements, the product contributes to stable engine function and reduced output.Designed for straightforward integration into existing engine builds, it allows for efficient rebuilding or restoration of engine performance.