HKS 71008-AF006 Super SQV4 BOV for 02-07 Subaru WRX/STi & 04-08 Forester X

Vehicle Fitment

• 2002-2007 Subaru Impreza WRX (Turbo, AWD)
• 2004-2007 Subaru Impreza WRX STI (Turbo, AWD)
• 2004-2008 Subaru Forester XT (Turbo, AWD)

Features

• HKS Super SQV4 sequential blow-off valve design
• Pull-type relief valve for stable boost control
• Dual valve structure for low to high boost range performance
• High-quality aluminum die-cast body
• High stiffness metal die-cast secondary valve
• Triple fin design for aggressive blow-off sound
• Includes vehicle-specific mounting flange and fittings
• Improved throttle response and turbo efficiency

Specifications

• Part Number: 71008-AF006
• Type: Sequential Blow-Off Valve (BOV)
• Material: Die-cast aluminum and metal valve components
• Boost range: Low to high support via dual valve action
• Mounting: Includes OEM-style flange and hardware
• Vehicle Fitment: Subaru AWD turbo models listed above
• Not CARB-legal in California (check local regulations)

Included Components

• 1x HKS Super SQV4 blow-off valve assembly
• 1x Vehicle-specific mounting flange
• Hoses, clamps, and fitting hardware for installation
• Installation instructions

Product Description

The HKS 71008-AF006 Super SQV4 Sequential Blow-Off Valve (BOV) is a high-performance turbo accessory engineered to replace the factory recirculation valve on select Subaru turbocharged AWD models, including the 2002-2007 WRX, 2004-2007 WRX STI, and 2004-2008 Forester XT. Its unique sequential dual valve design ensures reliable operation across a broad range of boost pressures, improving throttle response and reducing compressor surge during rapid throttle changes.

Constructed from high-quality die-cast materials with a distinctive triple fin design, the Super SQV4 provides an aggressive blow-off sound while maintaining smooth turbo performance. The included vehicle-specific mounting flange and hardware allow for a more integrated installation compared to universal BOVs. This kit is ideal for enthusiasts seeking enhanced sound, responsiveness, and durability on turbocharged Subaru platforms listed above. Always verify local emissions compliance and confirm fitment for your specific trim and year before installation.