Restore optimal combustion chamber sealing, control oil blow-by, and revive factory-grade performance with the Genuine Cummins 2882042 Piston Ring Set. This premium OEM engine component kit is designed specifically for the punishing cylinder environments of Cummins 15-liter heavy-duty diesel engines. Containing the complete matching set of rings required to service a single piston assembly, including the top compression ring, intermediate scraper ring, and oil control ring. This kit is an absolute necessity during any mid-life in-frame overhaul or major out-of-frame block rebuild. Relying on factory-certified Cummins piston rings ensures precise cylinder wall tension, preventing excessive oil burning and protecting your cylinder liners from premature scoring or wear. Complete Single-Piston Assembly: Includes the exact sequence of specialized compression and oil-control rings required to fully dress one factory piston. Advanced Metallurgy & Coatings: Engineered with premium-grade hardened alloys and high-durability coatings to withstand intense combustion pressures and minimize friction. 15-Liter Application Fitment: Precision-engineered for a flawless factory fit on heavy-duty Cummins ISX, ISX15, and QSX15 commercial and industrial diesel platforms. Eliminates Crankcase Blow-By: Restores an absolute mechanical boundary between the combustion chamber and the oil pan, minimizing unburnt fuel vapors and reducing oil consumption.