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