Gauge Series Features: • Black face gauge with magnified Tinted Lens • Brushed Aluminum Trim Ring • Red illuminated needle • Gauge visor • Mounting and Installation hardware • Instructions • 2 1/6 in gauge or 52 mm in diameter

Vacuum Gauge Includes: • T-Fitting and Hose Kit • All mounting hardware • Gauge Visor • Detailed installation instructions • Reads: -30 to 0 Vac • Mechanical Gauge • Free Tech Support • 12 month limited warranty

This Vacuum Gauge measures the engine's vacuum and compression level between 0-30 mmHG. This can alert you of low vacuum levels in your car before costly problems arise. A normal operating vacuum level is between 18 and 22, which means your engine is running with good fuel/gas economy. A vacuum level below 18 may indicate a leak in your vacuum system, which ruins crucial car operations such as timing and specific sensors to keep your car running efficiently. For maximum engine power performance, a level higher than 22 indicates the engine is running at its peak performance.