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HKS HIPERMAX S WRX STI Full Kit Subaru WRX | STI 2015-2021 - 80300-AF009

HIPERMAX S Suspension System

Experience a new level of comfort and handling with the HKS HIPERMAX S series, designed specifically for the Subaru WRX and STI models from 2015 to 2021. This innovative suspension system integrates advanced technologies from the previous MAXIV GT series, resulting in superior ride quality and performance.

Key Features:

  • Dual PVS: Our upgraded dual preload valve system minimizes unnecessary damping force at higher piston speeds, enhancing ride comfort without compromising driving dynamics.
  • Wide Range Damping Force Adjustment: The improved Needle Jet design allows for a broader range of damping force adjustments, making it perfect for various driving conditions.
  • Advanced Bump Stop Rubber: A newly designed bump stop rubber effectively reduces body roll while maintaining exceptional ride comfort, surpassing standard hydro bump stops.
  • Low Friction Technology: Utilizing cutting-edge tribology technology, the HIPERMAX S offers increased durability and reduced friction, contributing to a smoother ride and better handling.
  • 3-Year Warranty: Enjoy peace of mind with an extended warranty, reflecting our commitment to quality and the optimization of internal components.
  • Single Tube Design
  • 30 Levels of Adjustable Damping
  • Shock-Body Length Adjustable
  • Special Oil for Enhanced Performance
  • PNE Coating for Durability
  • Aluminum Bracket and Rubber Upper Mount
  • Custom Spec Changes Available
  • Overhaul Options Available

Specifications:

For WRX STI:

  • 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=-21(0 to -41) | R=-21(0 to -59)
  • Upper Mount: F=Rubber | R=Rubber
  • Spring Rate Change at Factory: F=Possible [±10 (1)] | R=Possible [±10 (1)]

For WRX 4D:

  • 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=-25(0 to -47) | R=-21(0 to -63)
  • Upper Mount: F=Rubber | R=Rubber
  • Spring Rate Change at Factory: F=Possible [±10 (1)] | R=Possible [±10 (1)]

Fitment:

  • Subaru WRX | STI 2015-2021
  • Subaru WRX 4D 2015-2021

Customer Feedback:

Many users have reported a significant improvement in ride comfort and handling precision after installing the HIPERMAX S suspension. The adjustable damping levels allow for personalized tuning, making it a favorite among driving enthusiasts.

Other Part Numbers:
HKS #hks80300-AF009

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Since its beginning, HKS has been committed to providing well-integrated, reliable,and environmentally sound performance systems. Mr. Hasegawa's strong leadership, engineering genius, creativity and willingness to listen to customers are the pillars of the company's success. Monitoring consumer reaction and input on issues pertaining to material quality, external appearance, sound quality, and of course, performance, HKS stays in tune with automotive enthusiasts' needs. Moreover, HKS' products are designed to be user friendly for easy installation.

Warranty for Exhaust System

HKS provides a warranty to the original purchaser of HKS exhaust systems against defects in materials and workmanship for a period of one year. The warranty applies only for vehicle specific exhaust systems. Other products such as metal catalyzers, front pipes, exhaust manifolds, and center pipes are not covered.

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Sale price None
Wholesale price $1,739.56
Shipping
Box # Box 1Box 2
Weight 43.9019.80
Length 2222
Width 1212
Height 88
Product Added At Friday 15 January, 2021
Product Modified At Friday 11 July, 2025
Imported By ETLOverride
Last Edited By Turn_API
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Emissions Info
Carb Approved -
Carb Number -
Epa Status N/A
Prop65 Unknown
Carb Required -
Vendors
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Vendor Inv Cost Retail Jobber Strict MAP Core Updated
Turn 14 $1,474.20 $1,950.00 ? $1,755.00 ? 2025-07-11 10:24:56


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