HKS SSQV4 BLow Off Valve For Subaru Impreza Hatch 08 -14 WRX STI


Price:
Sale price£258.00

Description

Product description

HKS Super SQV IV Blow-Off Valve for Subaru Impreza GRB GRF GVB GVF

The HKS Super SQV4 Blow-Off Valve is a vehicle-specific performance upgrade designed for selected Subaru Impreza STI GRB, GRF, GVB and GVF models.

Its sequential pull-type valve system provides fast, controlled boost-pressure release when the throttle closes. This helps reduce compressor surge while delivering the distinctive HKS blow-off valve sound.

The die-cast aluminium body and metal valve construction provide reliable operation under demanding turbocharged engine conditions. The standard triple-fin insert produces an aggressive discharge sound, while optional sound inserts allow the tone to be changed.

Key Features

  • Sequential dual-valve design: Uses primary and secondary valves to control boost release across a wide pressure range.
  • Pull-type relief valve: Boost pressure helps keep the valve securely closed under acceleration, reducing the risk of leakage.
  • Fast pressure release: Responds quickly when the throttle closes to help reduce compressor surge.
  • Die-cast aluminium body: Provides strength, durability and a premium silver finish.
  • Metal valve construction: Designed for reliable operation under demanding engine-bay conditions.
  • Triple-fin sound insert: Produces the distinctive HKS discharge sound.
  • Suitable for standard and tuned vehicles: Designed to operate across a wide range of boost pressures.

How the Sequential Valve System Works

  • During acceleration: Both valves remain closed, allowing the turbocharger to build and maintain boost pressure.
  • Initial throttle lift: The primary valve opens to release the first stage of excess pressure.
  • Higher pressure release: The primary valve activates the secondary valve, increasing discharge capacity when required.

Vehicle Fitment

  • Subaru Impreza WRX STI GRB
  • Subaru Impreza WRX STI GRF
  • Subaru Impreza WRX STI GVB
  • Subaru Impreza WRX STI GVF

Important: Vehicle compatibility may vary by year, market and engine specification. Please confirm the exact HKS part number and vehicle application before ordering.

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