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Optimize your Ford Fiesta ST’s turbocharger performance with the Turbosmart Kompact EM Plumb Back VR22. This award-winning blow off valve is the first genuine plug-and-play upgrade for your factory diverter valve. By replacing the weak OEM unit with this motorsport-proven billet aluminum valve, you eliminate common boost leaks and pressure failures. The Plumb Back design recirculates air back into the intake for quiet, factory-style operation while providing much sharper throttle response. Featuring an onboard proprietary solenoid and internal pressure control, this valve integrates perfectly with your Ford's factory electronics—no reference hoses, adapters, or extra assembly required.