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Refine GDB handling without turning every drive into a track session
HKS 80330-AF003 is the Hipermax S full kit for later GDB WRX STI applied models E through G. It combines 30-step damping adjustment, height-adjustable lower brackets, and rubber upper mounts for a street-focused balance of control and compliance.
Key Features
- HKS 80330-AF003 provides 30 damping settings at each axle.
- Inverted front and rear dampers support consistent control under load.
- Rubber upper mounts help limit added noise and harshness.
- Published spring rates are 69 N/mm front and 49 N/mm rear.
Fitment
| Years | Vehicle | Configuration | Notes |
|---|---|---|---|
| 2005-2007 | Subaru WRX STI | GDB, EJ20 turbo | Applied models E-G |
Specifications
| Detail | Value |
|---|---|
| Manufacturer part number | 80330-AF003 |
| Series | Hipermax S |
| Front spring rate | 69 N/mm (7 kgf/mm) |
| Rear spring rate | 49 N/mm (5 kgf/mm) |
| Damping adjustment | 30 steps front and rear |
| Damper layout | Inverted coilover front and rear |
| Upper mounts | Rubber front and rear |
What's Included
- HKS 80330-AF003 front and rear Hipermax S assemblies
- Matched springs, upper mounts, adjusters, and installation hardware
About HKS
HKS validates Hipermax spring and damper packages on the intended chassis. HKS 80330-AF003 is specifically assigned to GDB WRX STI applied models E through G.
Related Parts
- Application-correct adjustable end links
- Alignment hardware
- Replacement HKS dust boots and service parts
FAQ
What is the 80330-AF003?It is the coilovers configuration described on this page for the verified application and included components.
Will this fit every version of the listed vehicle?No. Match the year, model, chassis, engine, drivetrain, transmission, and exclusions in the Fitment table before ordering.
Is professional installation recommended?Yes. Correct installation, torque procedures, system checks, and any required alignment or bleeding should be completed by a qualified technician.
Does the kit include everything shown in the fitment notes?The package contents are limited to the items listed under What's Included. Related or supporting parts are separate unless explicitly listed there.
Can this be used on a modified vehicle?Possibly, but existing modifications can change clearance, compatibility, calibration, or installation requirements. Inspect the full combination before installation.
What should be checked after installation?Check fastener torque, leaks or clearances where applicable, warning lights, fluid level or alignment as relevant, and inspect again after the initial break-in period.
Is the product universal?No. It is vehicle-specific and must be matched to the verified application above.
Where can I find the exact application limits?Use the Fitment and Specifications tables on this page. Those sections contain the verified model, configuration, and exclusion details.
Installation Instructions
- Measure the original ride height and inspect suspension mounting points.
- Install each front and rear assembly in its assigned position.
- Set ride height within the HKS drivable range and torque all fasteners correctly.
- Complete a four-wheel alignment and recheck hardware after break-in.
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