Genuine replacement spring by TiAL TiAL BOV Spring brown (-0,89 Bar) Spring for all TiAL Blow Off Valves Genuine replacement spring by TiAL This replacement spring is used to set the opening sensitivity of the TiAL BOV. The pressure refers to the differential pressure between intake plenum and charge air pipe, NOT boost pressure! The smaller this number, the easier the valve opens. Color: brown Pressure: -0,89 Bar BV50 / -0,83 Bar at Q/QR/QRJ