The HKS Super SQV (Sequential Blow-Off Valve) is a blow-off valve that employs a unique two-stage sequential valve structure using a primary valve and a secondary valve, and achieves precise pressure control across a wide operating range from low to high boost pressure ranges through a differential pressure control system.
[Compatibility] Subaru WRX STI Model: VAB Engine: EJ20 (turbo) Year: 14/08- Impreza WRX STI Model: GVF Engine: EJ257 Year: 10/07-14/08 "WRX STI A-Line 4door" Impreza WRX STI Model: GVB Engine: EJ207 Year: 10/07-14/08 "WRX STI 4door" Impreza WRX STI Model: GRF Engine: EJ257 Engine: 09/02-14/08 "WRX STI A-Line" Impreza WRX STI Model: GRB Engine: EJ207 Year: 07/10-14/08 Please check the manufacturer's website for the latest compatibility information.
The HKS SUPER SQV (Sequential Blow-Off Valve) employs HKS's unique two-stage sequential valve structure using a primary and secondary valve, and its differential pressure control system precisely controls pressure across a wide operating range, from low to high boost pressure. Furthermore, its "relief-less operation method," which differs from the structure of conventional blow-off valves, suppresses relief during turbocharger boost and maximizes charge response when boosting and releasing the throttle repeatedly. The SQV IV supports all turbo vehicles to a new level.

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Car   Subaru Corporation   Subaru WRX   Subaru Impreza   Valve   HKS   ブローオフバルブ   Blowoff valve   HKS Super SQV4 Universal ASSY   HKS 08-11 STi SSQV4 BOV kit