08-04-2016, 03:05 PM
I would suspect it will seriously dislike a 2" hole drilled in the DPF, I don't know what would happen to forced regens if you do this. If it's part blocked, take it for a good long drive and keep the revs above 2000rpm or so.
Don't unplug the EGR valve, it will throw a fault code if you do.
Don't unplug the EGR valve, it will throw a fault code if you do.