we had a 2016 Ford 6.7 deleted. Had to put stock exhaust back on.
Here in Manitoba Canada where we don't emission test, the gov figured out they can make great deal of ticket money on deleted Diesels and vehicles with catalytic converters removed.
In Manitoba they now have roadside checks with mirrors to see if you have you DPF on, if not it fails a safety and you tow it home until it can pass a new safety with the stock DPF back on.
The 2016 we had deleted, ran better and better mileage. We put the stock exhaust back on and sold it and went down to a F150. Our other 2016 F350 6.7 long box we use for camping has always had the stock exhaust and we are keeping it.
Now the locals are gutting out the stock exhaust and getting away with it that way.