This is a NEW In frame Overhaul kit for IH 1466,1486, 1566, 1586, 3388, 4166, 4186, 5088, 6388 tractors with DT436 engines. This kit contains 6 Cylinder kits which contain sleeve,sleeve sealing o rings, piston, piston pin and piston ring set. Rod and Main bearing sets , Head gasket set and oil pan gasket. You must Email with bearing sizes . Rod & mains are available in STD .010. .020 ,and .030. . I also have major kits available for this application and many others . I have over 25 yrs. experience of rebuilding IH tractor and motors and have many parts available . Email your questions and I can probably help you. .