Ford Focus ST MK3 2.0L upgrade pop off valve open GFB

The coveted GFB pop off valve now also available as an open version. Unfortunately, the original air valves are very susceptible and all leak, which causes a loss of power, which is even more pronounced in performance-enhanced vehicles due to the higher boost pressure. You don't notice the loss of boost pressure at first, as the diaphragm gradually tears. The GFB valve is the best solution to prevent the loss of boost pressure! Features open valve prevents loss of boost pressure WOSHH fizzle effect The GFB valve comes as a complete kit replaces the faulty part of the original valve No need to buy a new pop off valve! Not approved in the area of StVZO