This belt tensioner fit Cummins Engine QSM11 ISM M11 is a must-have for any car or truck owner looking to replace their old or worn-out tensioner. It is manufactured in China with high-quality materials to ensure durability and long-lasting performance. The part number for this tensioner is 3400885, and it fits perfectly with Cummins Engine QSM11 ISM M11. It is designed to provide a comfortable fit and easy installation, making it a great choice for anyone looking to upgrade their vehicle's tensioner. Buy now and experience the best performance and reliability.