HKS Super SQV4 Blow Off Valve + Return Kit - 2008-2021 Subaru STI GRB/GRF

Here, you are looking at the HKS Super SQV4 Blow Off Valve w/ Return Kit for the 2008-2021 STI.

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 pressures. Since imitation is the highest form of flattery, HKS has once again redesigned the physical aspects of the Super Sequential Blow-Off Valve to thwart the counterfeiters.

The reliable functionality of the Super SQV 4 is unchanged and utilizes the same mounting flanges as all previous generation SSQVs. This assures compatibility with all optional HKS SSQV inserts, recirculation fittings, and recirculation kits. Super 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 a spring to increase sealing and durability.

Features:

• Pull-type sequential valve structure
• The 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
• Includes a pair of polished blow-off valve pipes
• Includes the HKS Suction Return Hose Kit to allow installation as a recirculation valve