HKS 05-07 WRX STi Max IV GT Coilover Kit

Regular price $2,424.00 USD $2,133.37 USD

Ready To Ship! Special Order! Ships in 10+ weeks

Part # hks80230-AF003V

The HKS Hipermax IV GT were developed and engineered to be the "ultimate street dampers." In order to take these one step further, HKS teamed up with Rally Driver Toshihiro Arai to improve comfort without losing performance.

The result is the Hipermax IV GT Spec-A, with revised spring rates and dampening. Using the expertise of Arai-san, a stiffer spring rate but longer length paired with softer dampening creates a more comfortable and natural ride without the loss in performance (similar to the coilovers used in Rally Racing). Likewise, they address the GDB's issue of understeer to improve overall performance!

  • 2005 Subaru Impreza WRX STi [GDB-E]
  • 2006 Subaru Impreza WRX STi [GDB-F]
  • 2007 Subaru Impreza WRX STi [GDB-G]

Note: Does NOT Work on 05-07 WRX!  Needs 5x114.3 pattern.


  • Special Edition: Tuned by Rally Champion Toshihiro Arai
  • Spec-A: more comfortable/natural ride without loss in performance
  • Hiper Linear Monotube Piston: As piston speed increases, dampening rate linearly increases
  • Standard 65mm diameter springs: Cold wound and manufactured in-house at HKS to ensure quality and consistency
  • Wide range of adjustment: 30-way adjustable dampening for precise tuning
  • New Top Mounts: front comes with pillowball camber plates


  • Type: Coilovers Suspension
  • Design: Inverted Monotube
  • Preset drop Front (Range): -46mm (From -0 to -58mm)
  • Preset drop Rear (Range): -28mm (From -0 to -38mm)
  • Front Upper Mount: Pillowball Camber
  • Rear Upper Mount: Rubber
  • Spring Length (Front): 250mm (Metric)
  • Spring Length (Rear): 250mm (Metric)
  • Spring Rate Front: 6 [kgf/mm] + 2 [kgf/mm] bumpstops
  • Spring Rate Rear: 4 [kgf/mm] + 2 [kgf/mm] bumpstops

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