HKS HIPERMAX S GDB(A-D) Full Kit for 04- IMPREZA WRX STI 4D / 02-07 IMPREZA WRX 4D/5D (hks80300-AF002)

Regular price $2,430.00 USD $2,130.66 USD

Ready To Ship! Special Order! Ships in 6+ weeks

Part # hks80300-AF002

The HKS HIPERMAX S GDB(A-D) Full Kit is uniquely designed to aim for a more pleasurable handling performance and comfy ride. We evolved the existing preload valve system to the dual preload valve system to suppress the generation of unnecessary damping force during higher piston speeds. This provides major improvement in ride comfort without influencing the driving performance. The enhanced shape of the Needle jet expand the range of damping force adjustment. This makes us possible to handle driving on a wider range of stages. A new shape bump stop rubber reduces the body roll and achieves ride comfort at the same time which cannot be achieved with general hydro bump stop rubber. Also, with the advanced tribology technology, we have achieved even higher durability and lower friction thtan conventional products. This technology contributes to improved ride quality and handling performance. HIPERMAX S Series has a three-year warranty due to the optimization of internal parts and quality improvement.


  • Impreza WRX STI 4D (2004)
  • Impreza WRX 4D (2002, 2003, 2004, 2005, 2006, 2007)
  • Impreza WRX 5D (2002, 2003, 2004, 2005, 2006, 2007)


  • Dual PVS
  • Wide Range damping force adjustment mechanism
  • Evolution of Bump stop rubber
  • Low Friction Technology
  • 3-year warranty

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In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
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