Intended for the EJ257 engines of the Subaru Impreza STI 08+, this HKS Super SQV4 blow off valve is without doubt one of the most impressive on the market, whether it be for its finish, its sound or its efficiency. Featuring a unique sequential architecture coupled with an internal mechanical pressure control system, this HKS open dump valve is capable of handling any pressure without the need of any adjustment. Offering a sound that is both unique and aggressive, the SSQV4 by HKS is recognised as the most reactive dump valve on the market, offering an exceptional response time and making it one of the most installed in the world on Japanese cars.

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Direct mounting

Silver finish

Sequential structure

Aggressive sound

Mounting kit included

Assembly instructions included

Made in Japan