I also use their 35 PSI Boost Gauge (30-4406) on AUX1

The sensor that was bundled with my gauge is the 3.5 BAR/50 PSIa Brass Sensor (30-2131-50)

Positive is PSI, Negative is InHg
(Same as the gauge display)
Positive is PSI, Negative is also PSI
Positive is Bar, Negative is also Bar
**Disclaimer**
I used the info available from AEM, So use at your own risk blah blah. Your stuff may be different than mine so review the files before using etc.
[rant]Why don't these a**holes make a water/oil temp gauge in Celsius! it's only a dip switch and a face plate[/rant]
