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HKS – Universal SSQV4 BOV

$324.50

Super SQV4 Sequential Blow Off Valve by HKS

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.

This Super SQV maximizes the charge-response that repeats pressure-charging and pressurized air relief by throttle on and off and supports new generations of turbocharged vehicles.

Factory recirculation valve sound cannot be noticed, but once HKS Super SQV IV is installed, its unique & sharp high frequency sound demonstrates its existence. Super SQV IV significantly increases its presence and improve the engine compartment appearance. To match with the appearance created by HKS Intercooler Piping Kit, the buff-polished casting pipe is included. By both the sound and appearance, Super SQVIV increases the fun to drive.

Choose Finish:

Silver
Black

Clear

SKU: N/A Categories: 2.7L F-150 Turbo Components, 3.5L F-150 Turbos & Components, Fiesta ST BOV, Focus RS Blow Off Valves, Focus ST Blow Off Valves, S550 Blow Off Valves, S550 Turbos & Components Tags: HKS - Universal SSQV4 BOV, HKS BOV

HKS

HKS – Universal SSQV4 BOV

One of the most iconic blow-off valves in the performance world. The HKS Super SQV4 delivers the unmistakable HKS sound, precision Japanese engineering, and a look that stands out in any engine bay — now available in classic silver or stealthy Black Edition.

Both versions are built around the same proven sequential valve structure combined with a differential pressure control system, allowing stable operation across a wide range of boost — from low to high pressure. The Pull-Type relief design ensures consistent, reliable performance regardless of boost level, maximizing charge response every time you get on and off the throttle. Triple fins set at the center of the funnel produce a dynamic, aggressive sound that makes its presence known. Once installed, the sharp high-frequency tone of the SQV4 replaces the factory recirculation valve sound entirely.

Charge Pipe Compatibility: The HKS SQV4 is designed to work with any HKS flange charge pipe — including CVF charge pipes carrying the HKS flange. If you’re already running a CVF charge pipe setup, this is a direct, clean fitment upgrade.

Choose your finish: The Silver edition features a buff-polished casting pipe and clean polished body — a timeless look that pairs perfectly with intercooler piping builds. The Black Edition takes it further with a glossy black painted body and upper section, paired with a grainy crystal black funnel and black-coated aluminum die-cast body for a stealthy, aggressive aesthetic.

Whether you’re building a track car or a street performance build, the HKS SQV4 is a proven upgrade backed by decades of JDM engineering excellence.

Silver | Part #: 71008-AK001 Black Edition | Part #: 71008-AK005 Fitment: Universal — compatible with any HKS flange charge pipe including CVF Price: $324.50

Please verify fitment with your specific application before ordering.