Atmospheric Blow Off Diverter Valve (BOV) Fit For BMW N20 2.0 Turbo F10/F20/F30 Black Stealth Black anodised for a factory look. This is a ATMOSPHERIC unit, therefore if gives off a 'woosh' style noise on lift off. Designed as a direct replacement for OEM diverter valves, it integrates seamlessly with factory ECU control logic. No aftermarket tuning is required for standard or mildly modified turbo setups. Precision-machined internals and sealed actuation mechanisms ensure consistent operation over extended use, minimizing the risk of pressure leaks or mechanical failure under demanding conditions., Manufacturer: TLVBFPG