4PC Performance Piston Rings Set with STD Diameter 82mm for W204 W212 C200 C250 E250 CGI 1.8T Engine Fit Replacement This piston ring set includes four -engineered rings designed to fit engines with a standard bore diameter of 82mm.Compatible with specific inline-four turbocharged engines, the set supports proper compression and oil control within the cylinder block.Each ring is manufactured to meet specifications for dimensional accuracy and material.The set is intended for use during engine rebuilds or performance maintenance where piston ring replacement is required.Installation requires proper tools and adherence to factory service procedures. This item is a compatible alternative.Use of brand identifiers is limited to showing which models it fits.