Contains wide gap rings. Use only w/ valve cover breather.Includes:• (6) HC1817645 Cylinder Kits• (1) HC1823851 Rod Bearing Set• (1) HC1823843 Main Bearing Set• (1) HC1817254 Head Gasket Set• (1) Oil Pan Gasket• (1) Oil Suction Gasket• (1) Oil Suction Tube GasketThe HC1825443 Inframe Overhaul Kit, International Harvester/Navistar DT466 Diesel Engine fits equipment brands such as: Case IH, IH/Navistar Engine, InternationalThe HC1825443 is a substitute for the following discontinued products: HCRRP850