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Symposer-Port HKS SQV "Black Edition" Blow off Valve kit 2014+ Fiesta ST

$ 379.99

The Symposer-Port blow off valve installs in place of the OEM symposer box located on the cold side intercooler pipe.  By installing this BOV, you will remove/delete the OEM plastic bypass valve located directly on the turbo

Each kit includes:

  •  HKS Black Edition SQV IV BOV
  • Custom symposer BOV adapter, hose section and clamps
  • whoosh BPV block off plate with hardware
  • whoosh boost tap with hose and clamps 
Dual Valve Structure, Sequential System

At low boost ranges the Primary Valve opens, and at high boost ranges the Secondary Valve also opens, resulting in linear response and optimal blow-off operation at all boost levels.

  • Accelerator ON
    Valves Closed

    As pressure rises in chamber C, pressure is applied to both the Primary and Secondary valves. The higher the boost pressure, the more pressure is applied to the valves, preventing leaks.

  • Accelerator OFF
    Primary Valve Opens

    Throttle lift creates a pressure difference between chambers A & B, opening the primary valve bypassing the secondary valve. this creates the initial discharge.

  • Accelerator OFF
    Secondary Valve Opens

    When pressure difference in chambers A & B reach a maximum, the Primary Valve pulls the Secondary Valve open, creating a secondary discharge.

Pull-Type blow off valves will work for any turbocharged vehicle, from stock to highly tuned.

Typical push-type blow off valves require spring load settings for each vehicle specification. If the spring load setting is too low, the valve may leak under high boost and the desired boost setting may not be reach. If the spring load setting is too strong, it may not open at low boost. The Super SQV will operate under any boost pressure setting without leaking.


*when Black Edition HKS BOV's are out of stock , metallic silver HKS BOV's are automatically substituted 


Customer Reviews

Based on 2 reviews Write a review

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Customer Reviews

Based on 2 reviews

Amazing product, awesome support from whoosh/ron during install. Accompanied with S280. No leaks from symposer anymore. The sound is unmistakable. I ordered a 3d printed insert from UK, sounds like an eagle screaming everytime the pressure relief opens, it's awsome.

What else would you expect...

I just bought and installed this on my car. When I got it, I was a little daunted as there were no specific instructions for this install, but the customer service from Whoosh was outstanding. Walked me through when I had questions, helped troubleshoot. Just incredible. If you're not a big dummy like me, this is an easy install. The hardest part was removing the OEM bov because it's impossible to reach. The conjunction of the symposer delete and this bov sound is so good, and I'm looking forward to doing other supporting mods with Whoosh parts.