Removing your Cummins ISX engine's emissions controls commonly called an "ISX delete" is a kind of increasingly common modification for heavy-duty trucks, but it’s very important to understand the https://docs.google.com/document/d/1YJ-ZuLmYetTvMPx7g2qT8bo50-pAOQAwOOTOnN8Wb8I/edit?usp=sharing