GlowShift’s White 7 Color Series BAR Boost/Vacuum Gauge monitors your vehicle’s compression and boost levels from -1 to 2 BAR, ensuring that your turbo does not overboost. This mechanically operated turbo boost gauge is ideal for anyone who prefers having their gauge readings displayed in the metric standard of BAR rather than PSI. You’ll also have the classic look of an analog gauge with an illuminated red needle that sweeps 270 degrees and choice of a blue, green, yellow, purple, red, teal or white LED display on a White gauge face.