The LC1 across the board at stoich and WOT was within +/- .1 -.2 afr from commanded. At WOT the PLX still read leaner than commanded anywhere from +.0 - .3 afr which isn't bad at all and made me feel better about WOT tuning with it but the PLX being off from +.7 - 1 AFR afr won't work for me because I'm siming the NB and it was throwing off my trims on that bank.
I also put kooks 1 7/8 LT headers on my car which had no effect on either.