Optimize the performance of your Cummins 855 engine with the Fortpro Premium Piston Ring Set. Designed to provide a perfect seal, control oil consumption and improve heat transfer, this piston ring set is essential for keeping your engine running efficiently and long-lasting. Manufactured from high quality, precision materials, this set meets and exceeds OEM specifications, ensuring exceptional compatibility and performance. With Fortpro, your engine gets the best in quality and reliability. Specifications: Brand: Fortpro Vehicle Type: Semi-Trucks / Heavy Trucks Product Department: Engine Product category : Cummins Parts Part Type: Piston Ring Set OEM Reference #: 3801056, 3801056S, CUM3801056S Ring Count: 4 Inside Diameter (ID): 5.5 in. / 139.700 mm Material: Steel Alloy Applications: Cummins 855 Engine CrossReference: Cummins: 3801056, 3801056S, CUM3801056S, 4089810 PAI: 505070