HKS SSQV4 Blow Off Valve Kit 08-19 Subaru STi

This HKS SSQV4 BOV is the grandfather of blow-off valves with its flagship sound that remains to be one of the most effective blow-off valves in the aftermarket industry till this day. Details: Pull-type sequential valve structure New differential pressure control system allows for stable operating ranges from low to high-boost pressures Includes vacuum line filter Includes circlip, T-fittings, and zip ties Includes recirculation connectors Includes factory-like flange to bolt onto the intercooler