Removing the Cummins ISX engine's emissions controls commonly called an "ISX delete" is the increasingly popular modification for commercial trucks, but it’s very important to understand any implications. https://docs.google.com/forms/d/e/1FAIpQLSdspTJGjB4yyIADRybb0YyNWTc_87geTql01KwiqZgtJ2pPpw/viewform?usp=publish-editor