OEM number EJ7Z6108E design standard 0.00 specification with no fit cylinder expansion piston pin diameter 22mm piston diameter 87mm compatible with 2015-19 Focus Mustang MKC 2.3L engines package includes one set of pistons and one set of piston rings This 4 piece per set standard piston and rings kit is built for use with 2.3L engine applications the 87mm piston diameter and 22mm piston pin provide proper fitment for specified models consistent compression and performance the standard 0.00 specification maintains bore dimensions without expansion Designed for compatibility with 2015 to 2019 Focus Mustang and MKC vehicles this kit supports straightforward installation as part of engine repair or rebuilding processes each set includes both pistons and matching rings to allow complete assembly The construction supports under normal driving conditions and moderate performance demands materials used meet applicable standards including low emissions at 105℃ compliance and over time this piston and ring set helps restore engine efficiency and drivetrain responsiveness