This belt tensioner is designed to fit Cummins diesel engines with ISZ QSZ models. It is a high-quality replacement part with OE/OEM part number 4316726 and manufacturer part number 4316726. Made in China, it is suitable for use in timing components and kits for engines and engine parts. The tensioner is specifically designed for belts and pulleys, ensuring a perfect fit for your vehicle. It is compatible with a wide range of car and truck parts and accessories, making it an ideal replacement for your old or worn-out tensioner. Buy now and get your engine running smoothly again!