X-Series Fluid Pressure Gauge Kit 0-150psi/0-10bar Black Bezel and Black Faceplate AEM ElectronicsAEM's 30 0306 X Series 30in Hg 35PSI 1 2. 5BAR Digital Boost Display gauge combines incredible looks, increased readability and a multitude of new, easy to use features! It is a must for users who want highly accurate boost pressure readouts up to 35 PSI or 2. 5 BAR in their high performance vehicle. Note: The 30 0306 comes with a black bezel and reversible black PSI BAR boost pressure faceplate. You will need to purchase the optional 30 0306 ACC