The Litens 910013A Accessory Drive Belt Tensioner is a genuine replacement part designed specifically for Detroit Diesel Series 50 and 60 engines. Made in the United States, this durable drive belt tensioner assembly is a direct fit with no core charge required. The product includes a single piece of high-quality Litens hardware, making it a reliable choice for maintaining the accessory drive belt system in your vehicle. Built to last and performance tested, this tensioner ensures optimal functionality for your engine cooling components. Orion Bus Orion VI: 2000. New Flyer D60: 1995. New Flyer C40LF: 2001. 8.5L L6 CNG. 8.5L L6 Diesel Turbo/Aftercooled. 11.1L L6 Diesel Turbo/Aftercooled. 12.7L L6 Diesel Turbo/Aftercooled.