HKS Hipermax IV GT Spec-A Coilovers - 02-07 Impreza WRX & 04 Impreza WRX STI

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!

Applications:

• Subaru Impreza WRX [GD] (2002, 2003, 2004, 2005, 2006, 2007)
• Subaru Impreza WRX STI [GDB] (2004)

Features

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

Extended Information

Type: Coilovers Suspension
Design: Monotube
Preset drop Front (Range): -46mm (From -0 to -56mm)
Preset drop Rear (Range): -38mm (From -0 to -33mm)
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