Williamston Products, Incorporated (WPI) is a leading supplier of innovative interior trim components in the North American auto industry.  Even though WPI has been a name only since April 2007, the business and plants have been manufacturing many of these same products for over 30 years (established in 1977).

Our product lines are manufactured in Michigan and Mexico, with a vast array of processes and technologies ranging from blow molding, injection molding, vacuum and thermo forming, laminating, and cut and sew among many others.