I've done quite a bit of reading on how a cam like this can cause false lean readings at idle, but why would it only appear on the wideband and not the narrowband? The wideband matched the dyno wideband for the pulls so I have to trust it.
Sensor is about 40" downstream and before the X-pipe.
I believe it's the middle one, but could be the one on the right. Definitely the Deka 60# Tall.
660cc FIC_Deka60_Tall_03242022.xlsx