HKS Hipermax S full coilover kit for the 2005–2007 Subaru Impreza WRX STI (GDB chassis, Applied E through G). 30-level damping adjustment, large-diameter monotube damper, and Dual PVS (Dual Preload Valve System) to suppress excess damping at higher piston speeds. Spring rate: front 69 N/mm (7 kgf/mm), rear 49 N/mm (5 kgf/mm); spring lengths 200mm front and 250mm rear. Length-adjustable shock bodies for ride height. Comes pre-assembled with top hats, spanner wrenches, and damper adjustment tool. Made in Japan. 3-year / 60,000 km warranty.
| Type | Hipermax S — large-diameter monotube coilover kit |
| Spring Rate | Front: 69 N/mm (7 kgf/mm) · Rear: 49 N/mm (5 kgf/mm) |
| Spring Length | Front: 200mm · Rear: 250mm |
| Damping Adjustment | 30-level, externally adjustable |
| Valve System | Dual PVS (Dual Preload Valve System) |
| Ride Height | Adjustable via length-adjustable shock bodies |
| Origin | Made in Japan |
| Warranty | 3 years / 60,000 km |
| Quantity | 1 set (front & rear) |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2005-2007 | Subaru | Impreza WRX STI | GDB Applied E-G |
