Want to know what's really happening inside your engine? This Equus boost/vacuum gauge gives you the inside scoop on your turbo or supercharged setup. The 2 5/8 inch diameter fits perfectly in most gauge pods or dash openings, and the white dial with bright backlighting makes it easy to read day or night. It measures both vacuum (0-30 in Hg) and boost pressure (0-20 PSI) with a smooth 270-degree needle sweep that looks seriously cool. The mechanical bourdon tube movement means accurate readings without any electrical calibration headaches. Installation is pretty straightforward with the rear twist-on mounting ring - no special tools needed. Whether you're tuning your turbo, diagnosing engine issues, or just want to monitor your vehicle's performance, this gauge delivers reliable data you can trust. Perfect for import tuners, muscle car builds, or anyone who wants to keep tabs on their engine's health. The aluminum housing keeps things lightweight and durable. Much better than guessing about your boost levels - know exactly what your engine is doing with this professional-grade gauge that won't break the bank!