Removing the Cummins ISX engine's emissions hardware commonly called an "ISX delete" is the increasingly widespread modification for commercial trucks, although it’s very important to understand any https://docs.google.com/forms/d/e/1FAIpQLScp5Ww4wOTB5pu4M9Ed1xbDue3po8Z-ueS18Z1cX-ekPvr4cw/viewform?usp=publish-editor