AutoMeter Z-Series Mechanical Vacuum Gauge - 2-1/16" 51115222 Built-in Internal/External Fins:

Built-in Internal/External Fins:

1/2 in OD to 3/8 in ID

1978-1980 Pontiac Grand Am

Exhaust Only

AutoMeter Z-Series Mechanical Vacuum Gauge - 2-1/16" 51115222 Built-in Internal/External Fins:Whether tuning your vehicle for maximum performance or monitoring your driving for maximum fuel economy, AutoMeter's Mechanical Vacuum Gauge has been the solution trusted by professionals for years. An ultra precise bourdon tube meter movement sits at the heart of this instrument, providing the kind of accuracy and durability necessary to compete at the highest levels. A simple 1 8 NPT fitting on the back makes installation easy, and 1 8 nylon line