Prosport Mechanical Boost Pressure Gauge Prosport gauges offer an unbeatable quality/Retail EUR inc VAT" ratio giving you the quality and function of an expensive gauge for a great "Retail EUR inc VAT". A boost pressure gauge is important when running a forced induction engine. Over-boosting will cause engine issues that could result in major engine damage. Under-boosting will hurt performance holding back potential engine power. A boost gauge is also an essential part of setup fitting a new boost controller for example. Prosport gauges are SEMA award winners a testament to their quality function and design. When the gauges are powered up they perform a ""sweep"" animation and once turned off the gauge is completely black. Each gauge is supplied with the relevant accessories and wiring to make installation as quick and easy as possible."