Get your semi truck Ready for the Road Ahead with decreased friction between moving parts, with the Dorman Heavy Duty Plastic Radiator Grille. By utilizing a dry graphite formula, this replacement lubrication is a safe solution for areas where flammable petroleum products must be avoided. Built with a temperature-resistant blend that lubricates and guards components in spaces up to 850° F. FleetPride is your First Click in Heavy Duty .