Autometer Cobalt 52mm 0-35 psi Mechanical Boost GaugeBrand AutoMeter Part Number 6104 Category Gauges & Pods Gauges Condition Brand New Original Manufacturer Packaging Mechanical boost gauges have become the staple in boost pressure monitoring for all types of engines, gasoline, diesel, or otherwise. Ultra precise bourdon tube meter movement ensures accuracy and durability not seen anywhere else in the industry. A simple 1 8" NPT pressure connection requires no electrical hookup for operation. Includes