If you want to experiment with the passenger car O2 sensor you could. Plug it in and see how the car runs. Take some careful data logs with each O2 sensor and see if there is any difference. I kind of doubt that Holley plays around with the calibration since they would most likely want to use off the shelf stuff but I'm not positive one way or the other.
I would agree.
I doubt they can change the calibration of a sensor but they may have one made specifically for them by the same MFR. that may look the same. One would have to have a source inside holley or their supplier to confirm. Or the ability to test both while recording any differences.
