RealTruck carries a great selection of custom door sills your 1991 Ford F350 truck. Shop an excellent selection of door sills you need to upgrade your Ford pickup. RealTruck carries stainless steel, billet aluminum, diamond plate, and illuminated door sills for your 1991 Ford F350. We also offer free, fast shipping, and the best customer service you can find. Shop now or give us a call at 877-216-5446.