Removing this Cummins ISX engine's emissions controls commonly called an "ISX delete" is the increasingly common modification for commercial trucks, but it’s very important to understand any implications. https://webdirectorytalk.com/listings1327977/cummins-isx-engine-delete-the-ultimate-guide-to-cummins-isx-kit-options-potential-drawbacks-and-safety-requirements-for-cummins-isx-owners