This ECM Wiring Harness is designed to fit Cummins Engine M11 ISM QSM. It is perfect for those who need to replace their old wiring harness or for those who want to upgrade their current one. The harness is made with high-quality materials to ensure that it will last for a long time. It is compatible with various types of vehicles and is easy to install, making it a great choice for both professional mechanics and DIY enthusiasts. Whether you want to replace your old wiring harness or upgrade your current one, this ECM Wiring Harness is a great choice.