HKS Super SQV IV Recirculating Blow-Off Valve Black Edition - Subaru WRX STI EJ20 (2007-2020)
The HKS Super SQV IV Black Edition is a premium recirculating blow-off valve developed for selected Subaru WRX STI (2007-2020) models equipped with compatible EJ20 turbocharged engines. The Black Edition combines HKS's renowned Super SQV technology with a discreet all-black finish and a recirculating configuration that routes discharged charge air back into the intake system.
The advanced sequential dual-valve system, combined with HKS's pull-type relief design, is engineered to provide rapid, stable, and controlled boost pressure release across a wide range of boost conditions. When the throttle closes, excess pressure is released from the charge-air system, helping to reduce compressor surge and minimise stress on the turbocharger. The pull-type design also uses boost pressure to help keep the valve securely sealed during acceleration.
The recirculating configuration routes discharged air back into the intake system instead of venting it directly to the atmosphere. This provides more OEM-style operation and a more discreet sound level while retaining the rapid response of the HKS Super SQV IV.
The Black Edition is distinguished by its exclusive surface treatment. The valve body and upper section feature a semi-gloss black finish, while the funnel is finished in textured wrinkle black. The result is a clean, premium, and motorsport-inspired appearance suitable for both standard vehicles and modified performance builds.
The kit features a vehicle-specific design for compatible WRX STI applications. It is an excellent choice for enthusiasts looking to combine the proven performance of the HKS Super SQV IV with recirculating operation and the exclusive styling of the Black Edition.
Features
- Designed for selected Subaru WRX STI (2007-2020) models.
- For compatible EJ20 turbocharged engines.
- Genuine HKS Super SQV IV Black Edition.
- Recirculating design routes discharged charge air back into the intake system.
- Sequential dual-valve system for rapid and controlled boost pressure release.
- Pull-type relief design for stable operation across varying boost pressures.
- Helps reduce compressor surge and minimise stress on the turbocharger.
- Provides more OEM-style operation and a quieter sound level than atmospheric discharge.
- Semi-gloss black finish on the valve body and upper section.
- Wrinkle black finish on the funnel.
- Premium and discreet motorsport-inspired appearance.
- Vehicle-specific kit for compatible WRX STI applications.
- Suitable for both standard vehicles and modified performance builds.
- HKS part number: 71008-KF013VB.
