HKS 02-07 WRX/ 04-07 STi SSQV4 BOV Kit - Black Ops Auto Works
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HKS 02-07 WRX/ 04-07 STi SSQV4 BOV Kit

HKS
HKS71008-AF006
4957266265062
Blow Off Valves
20+ Units In Stock - Ships Next Business Day
$ 434.50
FREE Ground Shipping!
$ 434.50

SKU: 71008-AF006 | UPC: 4957266265062

HKS 02-07 WRX 04-07 STI SSQV4 BOV Kit

The HKS SSQV4 BOV Kit replaces stock blow-off valves on 2002-2007 Subaru Impreza WRX and 2004-2007 WRX STI models. This sequential blow-off valve prevents compressor surge during shifts while releasing boost with a sharp sound. The complete kit ensures easy integration for turbocharged Subaru owners seeking reliable pressure management.

Key Features

  • Sequential Twin-Valve Design: Pilot valve opens first for instant throttle response then main valve engages for massive airflow up to 500HP
  • Complete Kit Contents: Includes SSQV4 valve black edition front pipe welding flange gasket and mounting hardware for bolt-on fit
  • Adjustable Preload: Turn screw fine-tunes opening pressure to match boost levels and ECU settings
  • Die-Cast Aluminum Body: Lightweight at 680g with durable anodized black finish resists corrosion and wear
  • High-Flow Capacity: Handles pressure up to 2.2 bar with minimal restriction improves turbo spool and longevity

Product Notes

  • Welding required on included flange to match intercooler piping diameter
  • Verify ECU boost map compatibility before install to avoid check engine lights
  • Secure packaging protects components during transit

Installation Notes

  • Professional installation recommended.
  • Weld flange to hard pipe after measuring 50mm inner diameter match
  • Uses stock mounting holes torque bolts to 10Nm with included hardware

This Part Fits

Year Make Model Submodel
2002-2007 Subaru Impreza WRX
2004-2007 Subaru Impreza WRX STI

Why Choose HKS?

  • Over 45 years developing turbo systems for rally and drift racing
  • JDM engineered components tested to extreme boost pressures
  • Direct replacement trusted by Subaru tuners for daily and track use

Frequently Asked Questions

  • Q: Will this fit my 2005 Subaru WRX?
    A: Yes it bolts directly to 2002-2007 WRX throttle body outlet with included pipe and flange
  • Q: What material is the SSQV4 made from?
    A: Die-cast aluminum body with anodized black coating and stainless steel springs for heat and corrosion resistance
  • Q: What is the warranty on this BOV kit?
    A: HKS provides a 1-year limited warranty covering manufacturing defects when installed correctly

Shipping & Handling

  • Method: UPS Ground or FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Sturdy box measuring 13 x 9 x 6 inches
  • Weight: 4.41 lbs

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