This Cylinder Kit contains Pistons made of hypereutectic aluminum alloy, which makes the piston inherently stronger. It is also more resistant to expansion and contraction, as well as scuff and corrosion resistant. Efficiency improves due to a better seal between the rings and cylinder wall.Includes: (1) HCTAR65502 Piston & Rings (1) HCTR32050 Cylinder Liner (1) HCTRE23172HC Piston (1) HCTAR40155 Cylinder Liner O-Rings The HCTRE23173HC High Compression Cylinder Kit fits equipment brands such as: John Deere