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HKS Super SQV4 Blow Off Valve 2008-2021 STI

by HKS
SKU 71008-AF013
Save $59.25 Save $59.25
Original price $395.00
Original price $395.00 - Original price $395.00
Original price $395.00
Current price $335.75
$335.75 - $335.75
Current price $335.75

Here, you are looking at the HKS Super SQV4 Blow-Off Valve for the 2008-2021 STI.

In 1994, HKS introduced the first Sequential Blow-Off Valve featuring a unique, pull-type, sequential valve structure and a differential pressure control system. This advanced pull-type relief system allowed for stable operating ranges from low to high boost pressures. Since imitation is the highest form of flattery, HKS has once again redesigned the physical aspects of the Super Sequential Blow-Off Valve to thwart the counterfeiters. 

The reliable functionality of the Super SQV 4 is unchanged and utilizes the same mounting flanges as all previous-generation SSQVs. This assures compatibility with all optional HKS SSQV inserts, recirculation fittings, and recirculation kits. 

Super SQV 4 features include a nickel-plated, die-cast metal secondary valve, which is swaged to the primary valve, a stainless steel C-Clip, and spring to increase sealing and durability.

Features:

  • Pull-type sequential valve structure
  • New differential pressure control system allows for stable operating ranges from low to high-boost pressures
  • Includes vacuum line filter
  • Includes circlip, T-fittings, and zip ties
  • Includes recirculation connectors
  • Includes factory-like flange to bolt onto the intercooler

Customer Reviews

Based on 3 reviews
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J
Jameson
JDM Authenticity

Classic BOV sound even when you install the BPV add-on!

Jameson,

It is great to know that you value the JDM authenticity and distinct flutter of the HKS Super SQV4 Blow Off Valve for the 2008-2021 STI. Your mention of the sequential aspect providing additional functionality under different boost pressures is particularly insightful, highlighting the valve's versatility and performance. We appreciate your 5 Star Review!

Regards,

J
Jameson
JDM authenticity

Has a distinct flutter even using BPV add-on. The sequential aspect adds an additional function under different boost pressures!

Jameson,

It is great to know that you value the JDM authenticity and distinct flutter of the HKS Super SQV4 Blow Off Valve for the 2008-2021 STI. Your mention of the sequential aspect providing additional functionality under different boost pressures is particularly insightful, highlighting the valve's versatility and performance. We appreciate your 5 Star Review!

Regards,

J
Jameson
Signature sound!

Paired with the BPV recirc kit you can still hear the pssshh but it operates much safer on these cars. The sequential aspect makes it very versatile.

Jameson,

Thank you for your 5 Star Review of the HKS Super SQV4 Blow Off Valve for the 2008-2021 STI. Pairing it with the BPV recirc kit not only allows you to hear the characteristic 'pssshh' sound but also ensures safer operation for your car. The versatility of its sequential aspect adds to its appeal. Your feedback will be helpful for others considering this blow-off valve upgrade for their STI!

Regards,

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