The dpf just catchs soot it doesnt alter smell. The doc is what makes the smell difference but these have a combo doc/dpf so I guess it would since you would remove both. The def does cause some smells but its injected after the dpf to react across the scr and doesnt go active tell the exhaust is warmed up.In the summer, if you put water as DEF and with GDE tune, would the smell be the same as if you deleted the DPF (and no DEF).
The smell is already bad, so how much worst is it if you deleted the DPF? I would think the DEF would make it smell worst, any thougths??