HKS Hipermax S Full Coilover Kit - 2015-2021 Subaru WRX / STI

The three existing MAX IV GT series becomes the HIPERMAX S starting in 2021. 9 years have passed since the launch of MAX IV GT, and during that time HKS has developed new technologies. It will be a new series that has all three conventional models characteristics, and been evolved by damping force characteristics, durability, and beauty. The HIPERMAX S series offers the best ride so far in HKS suspension history.

HKS Hipermax S Full Coilover Kit

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Highlights

• Dual PVS. 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.
• Wide Range Damping Force Adjustment Mechanism. The improved 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.
• Evolution of Bump Stop Rubber. A new shape of 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.
• Low Friction Technology. With advanced tribology technology, we have achieved even higher durability and lower friction than conventional products. This technology contributes to improved ride quality and handling performance.
• 3-Years Warranty. Compared to the one-year warranty period of the conventional MAX V GT series, the HIPERMAX S Series has a three-year warranty due to the optimization of internal parts and quality improvement.
• Single Tube
• 30 Levels Adjustable Damping
• Shock-Body Length Adjustable
• Special Oil
• PNE Coating
• Dual Pre-Load Valve System
• Aluminum Bracket
• Rubber Upper Mount

Specifications

• Spring Rate [N/mm(kgf/mm)]: F=88(9.0) | R=69(7.0)
• Spring Length (mm): F=220 (Straight Barrel Type) | R=170 (Straight)
• Height at Factory (Upper-Lower): F=-19(0 to -41) | R=-14(0 to -59)
• Upper Mount: F=Rubber | R=Rubber
• Spring Rate Change at Factory [Changeable Spring Rate N/mm(kgf/mm)]: F=Possible [±10 (1)] | R=Possible [±10 (1)]

The HIPERMAX S Series offers the best ride in HKS suspension history.

The three existing MAX IV GT series becomes the HIPERMAX S starting in 2021. 9 years have passed since the launch of MAX IV GT, and during that time HKS has developed new technologies. It will be a new series that has all three conventional models characteristics, and been evolved by damping force characteristics, durability, and beauty. The HIPERMAX S series offers the best ride so far in HKS suspension history.