STD Engine Piston Ring Set for Focus 1.8 Auto Parts Car Accessories OEM 6M51-6148-AA 6M516148AA 4 Cylinder Piston This piston ring set is designed for use with 4 cylinder engines in Focus 1.8L models.The set includes all necessary rings to service the engine pistons, matching the specification with 6M51-6148-AA (6M516148AA).Each ring is engineered to provide proper sealing between the piston and cylinder wall, helping maintain compression and reduce oil consumption.The components are built to fit standard bore sizes and are intended for use during engine rebuilds or performance maintenance.This set supports engine and is suitable for automotive repair and restoration applications.