HKS 80330-AF009 Hipermax S Series Coilover Suspension Kit

The HKS Hipermax S Series coilover kit (80330-AF009) is a fully adjustable, street-focused performance suspension system engineered by HKS — Japan's leading aftermarket performance specialist. Born from the evolution of the proven MAX IV GT platform, the Hipermax S represents a generation leap in ride quality, damping technology, and long-term durability.

Key Features:

• Dual Preload Valve System (Dual PVS): Evolved from the original preload valve system, the dual PVS suppresses unnecessary damping force at higher piston speeds, delivering a significant improvement in ride comfort without compromising driving performance.
• Wide Range Damping Force Adjustment: The redesigned needle jet geometry expands the usable range of damping force adjustment, allowing the coilovers to perform across a wider variety of road surfaces and driving styles — from daily commuting to spirited canyon runs.
• Advanced Bump Stop Rubber: HKS developed an improved bump stop rubber shape specifically for the Hipermax S that reduces body roll while simultaneously improving ride comfort — a balance that conventional hydro bump stops cannot achieve.
• Low Friction Technology: Internal friction reduction improves small-bump sensitivity and overall suspension response for a more refined ride feel.
• PNE Corrosion-Resistant Coating: HKS applied their proprietary PNE coating process, delivering up to 5x better corrosion resistance compared to standard galvanizing — ensuring long-term durability in all weather conditions.
• Full Spring Rate Adjustment: Factory spring rate changes are available (±10 N/mm / ±1 kgf/mm front and rear), allowing the kit to be tuned to individual driving preferences.
• 3-Year Warranty: Thanks to optimized internal components and quality improvements, the Hipermax S carries a 3-year warranty — triple the coverage of the previous MAX IV GT series.

Full Kit Specifications:

• Spring Rate F/R: 88 (9) / 69 (7) N/mm (kgf/mm)
• Free Length F/R: 220mm Barrel / 170mm
• Damping Force (0.1m/sec) Front — Stretch/Shrink: 809 N / 505 N
• Damping Force (0.1m/sec) Rear — Retention/Retraction: 363 N / 348 N

Comes pre-assembled and includes spanner wrenches and a damper adjustment tool for straightforward installation and on-the-fly tuning. The HKS Hipermax S coilover kit offers the ideal combination of performance, stance, and everyday usability.