The DPF is classed as a consumable item and as mentioned steam cleaning it will just make it look nice on a ramp. If i were you i would get it removed, get a straight pipe put in its place and then get it remaped. You wont have any more issues and you will get a bit more power out of it. Thats what i did with my Alfa and the difference was light and day.
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{CML Distribution}
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