Removing this Cummins ISX system's emissions controls commonly called an "ISX delete" is a kind of increasingly popular modification for industrial trucks, although it’s very important to understand the https://docs.google.com/forms/d/e/1FAIpQLSdspTJGjB4yyIADRybb0YyNWTc_87geTql01KwiqZgtJ2pPpw/viewform?usp=publish-editor