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Stratified Notes:

Installing an aftermarket BOV is a good idea when increasing the boost or airflow entering your motor. The HKS BOV can hold very high boost pressures and release pressure quickly (dual valves) and accurately to prevent surge. Most OEM stock valves are plastic and are designed to work at stock boost and airflow levels. Running the OEM by-pass-valve on modified engines becomes inadequate and these valves tend to leak and can't release pressure quickly enough. The result is simple: power loss. 

We include a $50 credit towards a Stratified Flash Tune with this purchase!


HKS Super SQV (Sequential Blow Off Valve) uses a unique sequential valve structure and a differential pressure control system, which allows for a broad operating range from low boost to high boost. Its Pull-Type relief design ensures stable operation regardless of the amount of boost pressure. The Super SQV will support new generations of turbocharged vehicles.

  • High Quality Aluminum Die-Cast Body
    Silver-coated aluminum die-cast body. Combines the ultimate in looks and durability in the engine compartment.
  • High Stiffness Metal Die-Cast Valve
    Secondary valve main portion is made of die cast metal. Reliable operation with beautiful looking.
  • Triple Fin design produces "Super Sound"
    Triple Fins set at the center of the funnel produces a dynamic and aggressive sound. An optional special Round Fin can be purchased separately for sound tuning.
**If order needs to be shipped outside of the USA, additional shipping charges will be calculated and added after the purchase**






  • Model: HKS_SQV4_71008-AK001
  • Shipping Weight: 0.8kgs
  • 6 Units in Stock

This product was added to our catalog on Friday 21 October, 2016.