HKS SSQV4 BOV Return Kit Plus VAG/VMG Black - 2015-2021 Subaru WRX
HKS SSQV4 BOV Return Kit Plus VAG/VMG Black - 2015-2021 Subaru WRX
HKS
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PRODUCT DETAILS
The SQV4 Black Edition Blow-Off Valve is the latest rendition of HKS's ever-popular SSQ blow-off valve to quickly purge boost in the 2015-2021 Subaru WRX.
RallySport Direct proudly carries quality performance products from the pioneers of the sport compact industry, HKS. They are one of the pioneers of aftermarket performance products!
This is the HKS Black Edition SQV4 Sequential BOV. This is the grandfather of blow-off valves with its flagship sound that remains to be one of the most effective blow-off valves in the aftermarket. This blow-off valve reacts very quickly to purge excess boost while creating that flagship HKS blow-off valve chirp. A great upgrade over the factory diverter valve in your WRX.
DETAILS:
- Black Edition
- Pull-type sequential valve structure
- The 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
- Will include the return kit to integrate into the stock plumbing
NOTE:
- Includes return kit
- The return kit will allow the user to convert the SQV4 into full recurculation
- NOTE NOT CARB LEGAL OR FOR SALE IN CA
WHY WE CARRY THIS
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
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Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
The SQV4 Black Edition Blow-Off Valve is the latest rendition of HKS's ever-popular SSQ blow-off valve to quickly purge boost in the 2015-2021 Subaru WRX.
RallySport Direct proudly carries quality performance products from the pioneers of the sport compact industry, HKS. They are one of the pioneers of aftermarket performance products!
This is the HKS Black Edition SQV4 Sequential BOV. This is the grandfather of blow-off valves with its flagship sound that remains to be one of the most effective blow-off valves in the aftermarket. This blow-off valve reacts very quickly to purge excess boost while creating that flagship HKS blow-off valve chirp. A great upgrade over the factory diverter valve in your WRX.
DETAILS:
- Black Edition
- Pull-type sequential valve structure
- The 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
- Will include the return kit to integrate into the stock plumbing
NOTE:
- Includes return kit
- The return kit will allow the user to convert the SQV4 into full recurculation
- NOTE NOT CARB LEGAL OR FOR SALE IN CA
