Today many horsepower enthusiasts are upgrading their engine with Turbo or Supercharger. For this reason we came up with this basic X-1 Boost Gauge with warning and peak functions. Made to resist cold temperature water or dust the X-1 Boost Gauge can be adapted to any engine with turbo or supercharger. The changeable scale from 15 to 30 psi, the warning, and peak recall functions make it a great tool.