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The HKS SSQV4 blow‑off valve kit fits 2008–2011 Subaru WRX STi turbocharged models. The SSQV4 is an aftermarket valve assembly intended to control boost release and compressor surge behavior in those STi applications, offering a direct replacement blow‑off valve solution tailored to the listed Subaru model years.
HKS 08-11 STi SSQV4 BOV kit
