Hartser G1378 Screen S7 Glass 13597

TiAL Blow Off Valve Springs are designed to work in all of their blow off valve models including the BV 50mm, Alpha Q, Q and QR valves. You should select the BOV spring pressure rating based on your engine's vacuum reading at idle, once the engine has reached operating temperature. However, the pressure ratings will vary depending on the model blow off valve you have, so please reference the chart below to ensure you are purchasing the correct spring for your application.

Spring Color: White
TiAL AQ Spring Rate/Vacuum Reading: 9 psi (.62 bar) for -14 to -17 inHg Engine Vacuum Reading
TiAL BV50 Spring Rate/Vacuum Reading: 9 psi (.62 bar) for -14 to -17 inHg Engine Vacuum Reading
TiAL Q/QR Spring Rate/Vacuum Reading: 8 psi (.55 bar) for -12 to -15 inHg Engine Vacuum Reading