I'm looking to purchase a wideband O2 sensor and am up in the air between the Inovate unit and Zeitronics unit. I'm leaning toward the Zeitronics unit. The only thing that irks me is to use their map sensor input you have to use their 3.5 bar sensor at the cost of 100 bucks. I know you can use the user specified 0-5 volt signal for a regular 3 bar map sensor. What bothered me was I emailed them about offering a 3 bar version and they responded that their sensor accuracy is way higher than the gm 3 bar sensor and that's why I should use it. My response is I'm buying a air fuel gauge and am tuning for a good mixture. Really if the map sensor could give me an accuracy of .5 # of boost I could really care less if the af is where it needs to be. I really can't justify 100 bucks for a sensor just for data logging. LMK what your thoughts are.