Considering a bypass of your Cummins Signature engine's exhaust system? A “delete,” generally referring to the deletion of Diesel Particulate Filters (DPFs) and Selective Catalytic Reduction (SCR) systems , https://oteldirectory.com/listings13754760/cummins-isx-engine-delete-everything-you-need-to-know-to-cummins-isx-delete-kits