Removing the Cummins ISX engine's emissions hardware commonly called an "ISX delete" is the increasingly widespread modification for heavy-duty trucks, but it’s critical to understand any implications. https://docs.google.com/document/d/1XrdQ0fVaJXOPEYuNU7nZ2RHcYCsUlGcWJoNSvsBs5Jw/edit?usp=sharing