42DD Inlet Air Temp mount....
42DD O2 spacer, should limit the CEL's hopefully.
The good news is as the USA are now copping DPF's on their TDI's and they are already onto developing aftermarket solutions. I am hopeful they will provide better DPF options, as I do want to keep one long term, but a cheaper, rebuildable, higher flow, less invasive regen one. The new MK6 has split the cat and DPF apart, thus lowering the cost of DPF replacement. That's GREAT news, and the path I would go if the DPF clogs and you want to stay OEM, retrofit the MK6 system.