Removing your Cummins ISX engine's emissions controls commonly called an "ISX delete" is the increasingly popular modification for commercial trucks, although it’s critical to understand any implications. https://vip-directory.com/listings13745699/cummins-isx-modification-guide-the-essential-guide-to-cummins-isx-engine-systems-specifications-and-industry-standards-for-heavy-duty-truck-operators