HKS Super SQV4 Blow Off Valve - 2008-2021 Subaru STI PDM_reclinable-seats we've achieved a design that

we've achieved a design that not only provide performance but also longevity

and could wind the springs with fewer coils

camber plates in the upper mounts and threaded adjustable lower mounts

or for circuit racing

HKS Super SQV4 Blow Off Valve - 2008-2021 Subaru STI PDM_reclinable-seats we've achieved a design thatSuper SQV 4 features include a nickel plated, die cast metal secondary valve, which is swaged to the primary valve, a stainless steel C Clip and spring to increase sealing and durability. In 1994, HKS introduced the first Sequential Blow Off Valve featuring a unique, pull type, sequential valve structure and a differential pressure control system. This advanced pull type relief system allowed for stable operating ranges from low to high boost