The 3400884 Idler Pulley is a critical component for Cummins Diesel Engine models including the M11, QSM, ISM, and QSB6.7. Made in China, this unit is designed to ensure smooth and efficient operation of the engine. With a quantity of 1, this idler pulley is a reliable and essential part for maintaining and repairing these specific engine models in a commercial or industrial setting. We supply premium, precision-engineered parts specifically for Cummins engines. If you can’t find what you’re looking for in store, it doesn’t mean we’re out of stock. The possible reasons are. The product was not put on the shelves in time. The product link was invalid. The keyword you searched for was incorrect. Your part number/machine model/serial number was incorrect. Category restrictions, more optional models cannot be uploaded. Therefore, please be sure to contact our customer service to inquire whether the goods you need are actually in stock. We art confident that we can provide the parts you need. We will respond within 24 hours. All parts’s photos are our original work, and any unauthorized use will be pursued.