AEM Classic Digital Hi-Boost Gauge Kit AEM 52mm Boost Digital Gauge -30-50psi Classic Digital Digital Gauge · Included brass sensor adapters, vacuum hose, and T-fittings for remote installation Digital Boost Gauge, -30 - 50psi, incl blk and wht faces, blk and silvr bezels · Optional white faceplate and silver bezel included · Reads as low as -30inhg (-15psi) of vacuum Digital Boost Gauge. -30-50psi Electronic Multi-Purpose Gauge · Reads up to 50psi of Boost Reads from -30 to 50 PSI GAUGE KIT BOOST 50 PSI AEM - Digital Gauge AEMEMULTBOOS -30~50psi