Design problems in the agricultural/off-highway segment of the transportation industry often stem from this dilemma: make vehicles perform better, but at no cost penalty. One solution is the engineering structural foam process. This process produces large, stress-free parts, with no sink marks and with molded-in function. Compared to metal, the engineering structural foam process offers greater design freedom, eliminates secondary labor, and parts will not rust or corrode. This paper will examine these, and other advantages, of this emerging plastics technology.