Removing the Cummins ISX engine's emissions controls commonly called an "ISX delete" is the increasingly common modification for heavy-duty trucks, although it’s essential to understand the implications. https://viewsdirectory.com/listings13735700/cummins-isx-engine-delete-a-detailed-explanation-to-cummins-isx-specifications-important-considerations-and-emissions-regulations-for-diesel-engine-owners