According to the June edition of Panorama magazine the changes to the engines were as follows:
Total redo of the exhaust system. The exhaust pipes are now routed to the wheel well area and back.
The engine now uses the new LSU wideband Lambda probes, pre-cat converter.
These probes provide more precise feedback to the engine CPU.
These new sensors are also used post cat.
That is what I have so far.
Hard to say how likely it would be to duplicate this if one were an aftermarket company.
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