Monitoring the vacuum and boost in your forced induction system is crucial for maximizing power output safely and keeping your engine within the powerband. AutoMeter's Digital Stepper Motor Boost/Vacuum Gauges offer the most precise readings available, with unmatched response time and smooth needle movement. Utilizing AutoMeter's sophisticated circuitry, these gauges calibrate automatically at each startup to adjust for altitude, barometric pressure, and other atmospheric conditions. They come with an advanced MAP sensor and a wiring harness to simplify installation. While they are designed for gasoline engines, there is also a boost-only version for diesel or high-boost applications. The modern blue LED through-the-dial lighting ensures clear visibility at night. COBALT