GlowShift’s Black 7 Color Series 30 PSI Boost/Vacuum Gauge is ideal for anyone running a turbo or supercharger in their vehicle to effectively evaluate your vehicle’s turbo boost feature. The mechanically operated turbo boost gauge will monitor your vehicle's boost readings from 0 to 30 PSI and your vacuum and compression levels from -30 to 0 inHG. You’ll also have the classic look of an analog gauge with an illuminated red needle and choice of a blue, green, yellow, purple, red, teal or white LED display on a Black gauge face.