The standard in the industry, AutoMeters Mechanical Boost/Vac Gauges have found their way into more builds than any other. Using a patented, high precision bourdon tube meter movement, there isnt another gauge on the market that can lay claim to the levels of accuracy or durability youll find here. A simple 1/8 NPT pressure connection requires no electrical hookup for operation. Includes 1/8 NPT fittings and nylon line kit. Features Traditional incandescent lighting illuminates around the perimeter of the dial Auto Meters race proven mechanical instruments provide trusted accuracy while being simple to install No electrical system required for gauge operation – compatible with every street or race vehicle Mechanical movements provide accuracy and durability even in the harshest environments Applications Universal What’s in the box? Autometer Z Series 52mm 30 In Hg.-Vac. / 30 PSI Boost / Vacuum Gauge 1/8 nylon line T-Fitting Vacuum fitting Compression fittings Bulb and socket assembly Red and green bulb covers Mounting hardware Detailed instructions for installation