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. The Super SQV will support new generations of turbocharged vehicles.

WRX   S4  VAG    FA20(TURBO)    14/08-    71008-AF015
SUBARU LEVORG VMG FA20 TURBO 2014-2020
SUBARU LEVORG VM4 FB16 TURBO 2014-2020

Installing this product creates unique sharp & high frequency SQV sound. The SQV IV unit is designed to be located beside the engine so the appurtenance of the engine bay is improved.
The suction-return parts are included (those are necessary to pass the Japanese Automobile Inspection.).
Any engine failure such as engine stall was not occurred during the in-house testing.

SSQV4 is the lastest Blow Off Valve from HKS Japan and comes with everything you need to install it . 

English instructions included 

HKS-71008-AF015

HKS Super SQV (Super Sequential Blow Off Valve) uses a unique sequential valve structure and a differential pressure control system, which allows for a broad operation range from low boost to high boost. All vehicle specific Super SQV kits include both the HKS Triple Fin Sound insert and Recirculation insert