Go Fast Bits Gauge Components 5800 Most modern engines have eliminated vacuum ports from the intake manifold, making it difficult to install boost gauges, boost controllers, aftermarket blow-off valves and other devices that require a signal from the intake manifold. Gauge Port/Boost Tap VW GTI Mk V/VI GFB?s Gauge Port range allows a quick and tidy solution by tapping into existing features on the intake manifold to provide an extra reference port. GFB Gauge Port Mark 5/6 GTI
