HKS 71008-KF015B SSQV4 Black Edition BOV Recirc Kit for 2015-2021 Subaru WRX FA2

Vehicle Fitment

• 2015-2021 Subaru WRX (VAG, 2.0L Turbocharged H4 FA20DIT, AWD) - Sedan
• 2015-2021 Subaru WRX (VMG, 2.0L Turbocharged H4 FA20DIT, AWD) - Sport Wagon / Levorg (JDM)

Fitment Notes

• Designed for the FA20DIT (Direct Injection Turbocharged) engine only - does not fit the WRX STI (EJ257 engine); see HKS 71008-KF013VB for the 2008-2021 STI
• Does not fit the 2022+ Subaru WRX (VB chassis, FA24DIT engine)
• VMG chassis designation refers to the JDM Levorg / WRX Sport Wagon; compatibility with specific trim levels of the US-market WRX Sedan (Base, Premium, Limited) is confirmed across all 2015-2021 model years
• Includes return (recirculation) kit - allows installation directly into stock intercooler piping or conversion to full closed-loop recirculation
• Not CARB compliant - not legal for sale or use in California

Features

• Black Edition finish - glossy black paint on the valve body and wrinkle/crystal black paint on the funnel for a stealthy, premium engine bay appearance
• HKS proprietary 2-stage sequential valve structure pairs primary and secondary valves to provide precise, graduated pressure relief from low to high boost levels
• Pull-type relief design ensures stable, consistent valve operation independent of boost pressure magnitude - suitable for stock through modified FA20DIT setups
• Differential pressure control system maximizes boost response by suppressing unnecessary venting during sustained overcharging and rapid re-boost events
• Triple Fin funnel design produces the iconic, aggressive HKS Super SQV blow-off sound signature
• High-stiffness die-cast metal secondary valve delivers reliable sealing and long-term durability under high thermal and pressure loads
• Includes return kit for full recirculation conversion - discharged air is routed back into the intake tract, maintaining MAF-based tune accuracy and idle stability
• Buff-polished cast adapter pipe compatible with HKS Intercooler Piping Kit for seamless HKS system integration
• Includes vacuum line filter, circlip, T-fittings, and zip ties for a complete, hardware-inclusive installation

Specifications

• Part Number: 71008-KF015B
• UPC: 4957266265789
• Valve Type: Super Sequential Blow Off Valve (SSQV4) - Black Edition, Pull-Type Relief
• Body Finish: Glossy black paint (body) / Wrinkle crystal black paint (funnel)
• Body Material: High-strength aluminum die-cast
• Secondary Valve Material: High-stiffness die-cast metal
• Engine: 2.0L Turbocharged Horizontally-Opposed 4-Cylinder (FA20DIT)
• Chassis Codes: VAG (WRX Sedan), VMG (WRX Sport Wagon / Levorg JDM)
• Drivetrain: AWD
• Package Dimensions: 10.60" W x 6.50" H x 10.70" D

Included Components

• 1x SSQV4 Black Edition head unit (valve body with Triple Fin funnel)
• 1x Vehicle-specific buff-polished cast adapter pipe
• 1x Return (recirculation) kit - hose, fittings, and clamps for full recirculation conversion
• 1x Vacuum line filter
• 1x Circlip
• 1x Set of T-fittings
• 1x Set of zip ties
• 1x Installation hardware set (hoses, clamps, fittings)

Product Description

The HKS 71008-KF015B Super SQV4 Black Edition is a vehicle-specific sequential blow-off valve kit engineered for the 2015-2021 Subaru WRX on the VAG and VMG chassis platforms, powered by the FA20DIT turbocharged flat-four engine. This kit delivers the full performance pedigree of HKS's flagship SSQV4 platform in a blacked-out aesthetic, featuring a glossy black valve body and a wrinkle crystal black Triple Fin funnel for an aggressive, stealthy engine bay presence. The two-stage sequential valve structure and differential pressure control system allow the SQV4 to operate across the entire boost range - from light throttle street driving through high-boost performance scenarios - with stable, reliable actuation at every point.

A key distinguishing feature of this kit is its included return (recirculation) package. The return kit allows the SSQV4 to integrate directly into the WRX's factory intercooler piping for an open atmosphere venting setup, or to be fully converted into a closed-loop recirculation configuration where discharged air is routed back into the intake stream. The closed-loop setup mirrors the behavior of the OEM bypass valve, preserving proper MAF sensor readings and idle stability - particularly important for WRX builds running stock or near-stock ECU maps. The kit also includes a vacuum line filter, circlip, T-fittings, and zip ties, providing everything needed for a complete installation without sourcing additional hardware.

The buff-polished cast adapter pipe is designed to complement the HKS Intercooler Piping Kit for owners building out a full HKS forced induction system on their WRX. Whether used in an open or recirculating configuration, the SSQV4 Black Edition produces the characteristic HKS blow-off sound - sharp, high-frequency, and immediately recognizable. This product is not CARB compliant and is not intended for sale or use in California. It is not compatible with the WRX STI (EJ257) or the 2022+ WRX (FA24DIT/VB chassis).