Contains narrow gap rings. Use only w/ crankcase mounted breather.Includes: (6) HC1802580 Cylinder Kits (6) HC1823855PR Rod Bearings (1) HC1823847 Main Bearing Set (1) HC1817254 Head Gasket Set (1) HC671827SET Oil Pan Gasket Set The HCNIKDT466NRW Inframe Overhaul Kit, International Harvester/Navistar DT466 Diesel Engine fits equipment brands such as: Case IH, International