Removing the Cummins ISX engine's emissions controls commonly called an "ISX delete" is a kind of increasingly common modification for heavy-duty trucks, however it’s critical to understand any https://docs.google.com/document/d/1Pg3pTEB3SHVFcByXJ4pDvoy2jIMW-j7t1H-z5OZmBWQ/edit?usp=sharing