Considering a removal of your Cummins ISX engine's exhaust system? A “delete,” generally referring to the removal of Diesel Particulate Filters (DPFs) and Selective Catalytic Reduction (SCR) systems , can https://medium.com/@MatthewArnoldd/improving-heavy-duty-diesel-engine-performance-through-smart-diagnostics-and-professional-ecm-902558ecf655