CTS TURBO 2017-2020 Audi B9 2.0T BOV (BLOW OFF VALVE) KIT

The CTS Turbo blow off valve kit addresses the factory diverter valve limitations found in B9 platform Audi 2.0-litre turbocharged applications. Engineered specifically for 2017-2020 A4, A5, Allroad and Q5 models, this kit replaces the recirculating valve with a proper atmospheric blow off valve design. The system reduces compressor surge during throttle lift-off, helping protect turbocharger longevity while delivering audible release under gear changes. Complete with all necessary hardware and fittings for direct installation, the kit suits both standard and modified B9 2.0T setups seeking improved pressure management and characteristic turbo sound.