Discover the durability and precision of our Idler Pulley, designed to fit seamlessly with Cummins Engine ISX15, QSX15, and X15 series. The OE/OEM Part Number 3681587 is ensured for accuracy, matching manufacturer part numbers 3896408, 3026269, and 3681587 for a hassle-free installation experience. Crafted with robust materials, this Idler Pulley is engineered to provide reliable operation and extend the life of your engine's accessory drive system. Whether you're replacing a worn component or upgrading for enhanced performance, this pulley is an indispensable investment for your heavy-duty engine.