Considering a removal of your Cummins ISX engine's exhaust system? A “delete,” commonly referring to the bypassing of Diesel Particulate Filters (DPFs) and Selective Catalytic Reduction (SCR) equipment , can https://www.tumblr.com/paccarpx7deletekitt/832419478125133824/common-dpf-and-egr-problems-in-commercial-diesel?source=share