Removing this Cummins ISX device's emissions controls commonly called an "ISX delete" is a kind of increasingly common modification for heavy-duty trucks, however it’s essential to understand any https://docs.google.com/forms/d/e/1FAIpQLSf0phG0UqSdIzLQN_4rp9QYfJNKbjcoqFnkIIY-jOmCwm_ObQ/viewform?usp=publish-editor