This piston rings kit is designed for use in GL8, ATS, and XT5 vehicles with 2.0L turbocharged engines.The set features +0.5 mm oversize rings for engines with a rebored 86mm cylinder bore.Included components correspond to reference numbers 19180831, 12652809, 12569638, 89018107, and 12683808.The kit contains one full set of piston rings (top, second, and oil rings), pistons, piston pins, and circlips.Piston specifications include an 86mm bore, 54mm length, and 32mm compression height.The three-ring design supports effective combustion chamber sealing, helps minimize oil consumption, and maintains stable thermal performance.Pistons are made from aluminum to resist thermal expansion and mechanical stress.All parts are manufactured to meet standard dimensional and functional requirements for replacement applications.