Reflex 26# v4. Recently put new downpipe on previous one cracked in half. Also, now have both post cat o2 sensors plugged in not sure if it makes any difference but figured i'd let you know. I've been seeing on my MHD gauges while sitting at a light or something, the AFR bank 2 sit around 13.8 sometimes while bank one sits around 14.8 was wondering if that's something I should be concerned about or not. I am running ADV o2's as my primary o2 sensor.