Replaced index 12 injectors with brand new ones from dealer. Still showed -25-28 LTFT. Checked cylinder compression with WPS sensor and Picoscope, cold engine with all plugs pulled showed 181-184.5 across all 6 cylinders. Dropped the downpipes and replaced bank 2 s1 O2 sensor one more time. Values still looked the same in INPA. Still hits a wall, and then trows a reduced engine power and then LTFTs reset, and trims look normal until a restart. So... I decided to flash back to stock file (Originally had Dinan tune on it when I loaded the initial MHD base map you provided). Drove around for 10 minutes or so and now all INPA values looked consistent across the banks. Flashed the basemap you provided and now the car its equal on both banks. Seems I was somehow fighting a software issue. Attached is a 3rd and 4th gear pull. Feels COMPLETELY different than it did when I originally flashed it - almost less touchy down low. Anyhow, I think I'm finally making some good progress. Please let me know your thoughts.

The car pulls "hits a wall" on moderate to high throttle in the mid range. Check on the 1730-1750 timecode for a moderate pull in 4th, easing into it. I'm concerned with the huge swing in fuel trims, so I need to look into that. large negative Bank 2 fuel trims, but bank 1 is positive. Index 12 injectors with less than 10K on them, but while I didn't remove them from the head when the engine was out, it is possible that debris got into the inlet. Put the car back on the lift and will check for any air leaks. Car is running .022 gapped ILZKBR7B-8G plugs. Stock Low pressure/High pressure fueling. RB TWO turbos with high flow inlets, freshly walnut blasted, new valve cover, both vanos solenoids, blocked off recirc with Tial Q valve as I recall. Wagner intercooler, High flow catted AR Design Cats, new Bosch O2 sensors (primary and monitors), Stock center section, Dinan rear muffler. Car is throwing a "3100 - DME Boost-pressure control, deviation"