Marmon Highway Technologies is manufactures and markets products to the automotive industry in the United States. The company offers heavy-duty spray suppression systems, which include tandem fenders, quarter fenders, mounting kits, deck plates, stainless steel fenders, light bars, and mud flap brackets; fifth wheels, including top plates, top plate options, and sliding and stationary brackets, which are used to couple tractors and trailers; and truck modifications to original equipment manufacturer, dealer, and customer specifications.