HKS 80330-AT008 Hipermax S Full Coilover Kit

The HKS 80330-AT008 Hipermax S is a complete, full-kit coilover suspension system engineered for street-focused performance. Successor to the long-running MAX IV GT series, the Hipermax S was developed over nine years of advanced research, incorporating new damping technologies, improved durability components, and refined ride quality tuning — representing the best street coilover HKS has ever produced.

At its core, the Hipermax S uses a single-tube (monotube) damper design that keeps the gas and oil chambers fully separated, allowing the use of a large-diameter piston for consistent, stable damping force across all driving conditions. The system employs HKS's Dual Preload Valve System (Dual PVS), which reduces high-speed damping while minimizing unwanted suspension movement — delivering a smooth, controlled ride on public roads.

Key Features:

• Single-tube monotube damper construction — separates gas and oil for stable, heat-resistant damping performance
• 30-level damping adjustment via the WR Needle wide-range valve system — each adjustment step is clearly defined for precise tuning
• Dual PVS (Preload Valve System) — refined from the previous generation for improved high-speed damping control
• Shock-body length adjustable — ride height can be set independently of spring preload for proper suspension geometry
• Advanced Bump Rubber Plus — progressive, early-engagement bump stop for a natural and smooth transition at full compression
• Low friction technology — advanced tribology coatings and materials reduce internal friction for improved ride quality and long-term durability
• PNE Coating — corrosion-resistant finish for extended service life
• Strengthened rubber upper mounts — absorb small-amplitude vibrations while improving mount rigidity over stock
• DURA BOOTS — heavy-duty dust boots with improved resistance to heat, weather, and ozone
• 3-year manufacturer warranty — backed by HKS's class-leading warranty coverage, made possible by optimized internal components and quality improvements over the previous generation

Specifications:

• Spring Rate (F/R): 137 N/mm (14 kgf/mm) Front / 98 N/mm (10 kgf/mm) Rear
• Free Length (F/R): 200mm Barrel / 220mm Barrel
• Damping Force — Front (Stretch/Shrink): 863 N / 657 N @ 0.1 m/sec piston speed
• Damping Force — Rear (Retention/Retraction): 677 N / 481 N @ 0.1 m/sec piston speed
• Vehicle Height Adjustment Range — Front: -48mm (0 to -87mm from shipment height)
• Part Number: 80330-AT008
• UPC: 4957266324752

The HKS Hipermax S full coilover kit includes everything needed for a complete four-corner suspension replacement — front and rear coilover assemblies, spanner wrenches, and an installation manual. It is manufactured in Japan and validated through extensive real-world durability testing before release.