A critical tool for every turbo car! Knowing your boost pressure is vital to ensure longevity of your engine. GFB’s 52mm mechanical boost gauge reads vacuum to -30inHg and boost to 30psi, with a bold and easy to read LED backlit face. When the ignition is turned off, the smoked lens darkens for a clean and stealthy look. Supplied with vacuum hose, mulit-size tee fiting, bezel and bracket to make installation easy.