HKS Super SQV4 Blow Off Valve - 2008-2021 Subaru STI

Spectral Performance proudly carries quality performance products from the pioneers of the sport compact industry, HKS.

Here, you are looking at the HKS SQ4 Sequential BOV for the 08+ Subaru STI. This 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.

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