X-Series Boost Pressure Display Gauge -30in/Hg 35psi / -1 2.5 bar. X-Series Boost Pressure Display Gauge -30in/Hg35psi / -12.5bar Details. AEMs 30-0306 X-Series -30in/Hg35PSI / -12.5BAR Digital Boost Display gauge combines incredible looks, increased readability […]