2-1/16 C/S Boost/Vacuum Gauge 30/45

The 2-1/16 C/S Boost/Vacuum Gauge 30/45 is an essential analog diagnostic instrument for tuning turbocharged and supercharged engines, as well as monitoring intake manifold vacuum on naturally aspirated builds. Designed for automotive enthusiasts and professional mechanics, this mechanical gauge provides real-time feedback on boost pressure and vacuum conditions—critical data for optimizing fuel mapping, detecting boost leaks, diagnosing turbo lag, and troubleshooting intake manifold issues. Whether you're dialing in a forced-induction engine or performing detailed vacuum diagnostics, this gauge delivers reliable performance without electronic complications.

This dual-range mechanical instrument measures from 30 inches of mercury (in HG) on the vacuum side to 45 PSI on the boost side, covering the full operating window for most street and moderate competition builds. The 2-1/16-inch diameter black-face dial features clear, easy-to-read markings that remain visible under poor lighting conditions—vital when monitoring gauge readings in an engine bay or during dyno tuning sessions. Its all-mechanical design eliminates the need for electrical power or calibration adjustments, ensuring consistent accuracy across temperature swings and vibration environments common in high-performance vehicles. The robust construction withstands engine compartment heat and vibration without drift or hysteresis.

This gauge benefits turbocharged and supercharged engine builders who need instantaneous boost feedback during baseline runs, tuning validation, and long-term durability testing. It is equally invaluable for diagnosing vacuum leaks, carbon buildup, and intake manifold flow issues on stock or modified engines. Installation requires only a direct tap into the intake manifold or turbo compressor outlet, making it compatible with virtually any engine platform—from domestic LS and Coyote engines to import builds and engine swaps. Compact 2-1/16-inch form factor allows dashboard or A-pillar pod mounting without excessive bulk, and the analog readout requires no batteries or software calibration, making it the most reliable choice for long-term durability and field troubleshooting.