4 Set KS Pistons Rings Kit Φ83mm STD 2740371401 2740301617 2740301517 2740300417 For C250 C300 W205 2.0T M274.920 This piston and ring set is designed for use with M274.920 2.0T engines.It includes four pistons and corresponding rings built to standard specifications with no cylinder expansion required.The cylinder bore measures Φ83.00mm, with bolts measuring Φ20mm in diameter and 51mm in length.Ring thicknesses are 1.2mm, 1.0mm, and 2.0mm respectively.The components are engineered for precise fitment in vehicles requiring part numbers 2740371401, 2740301617, 2740301517, and 2740300417.Designed for direct replacement, the kit supports efficient installation and integration with existing engine parts.Suitable for use in models equipped with the specified engine type, this set supports engine performance and under normal operating conditions.