Abstract: A cylinder liner for use in an internal combustion engine having a cylinder block with a cylinder bore adapted to carry a piston therein. The liner comprises a body formed from a powdered metal material, the body formed therefrom being rigid and wear resistant. The body comprises a smooth, inner, piston-directing surface; an outer, cylinder bore-contacting surface; and an upper, combustion containing area. A mechanism is provided for improving transfer of heat from the combustion containing area to the cylinder block. A mechanism, disposed within the piston-directing surface, is provided for improving piston scuff resistance while maintaining piston-directing surface smoothness.