Removing the Cummins ISX device's emissions equipment commonly called an "ISX delete" is a increasingly popular modification for heavy-duty trucks, although it’s critical to understand the implications. https://docs.google.com/document/d/1YJ-ZuLmYetTvMPx7g2qT8bo50-pAOQAwOOTOnN8Wb8I/edit?usp=sharing