HKS 05-07 WRX STi Max IV GT Coilover Kit

Regular price $2,112.25 USD Sale price $2,112.25 USD Regular price $2,400.00 USD
Sale 11.99% $287.75 USD (11.99%)
Special order - Ships in 8+ weeks
SKU: hks80230-AF003V
Product Description
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

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck & international items, will require up to 7 business days to ship due to size and logistics.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Unless otherwise noted as "In Stock" or exact ETA. Special Order items have an ETA of 5+ weeks.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $100.

All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

Processing and logistics on in stock international orders can take up to 7 business days to process & ship.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

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