Considering a bypass of your Cummins Signature engine's emissions system? A “delete,” generally referring to the removal of Diesel Particulate Filters (DPFs) and Selective Catalytic Reduction (SCR) systems , https://medium.com/@lakeshtarak377/diesel-truck-performance-guide-how-to-fix-dpf-egr-def-and-engine-problems-4c01f92dea11?sharedUserId=lakeshtarak377