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.