HKS 80300-AT030P Hipermax S Coilover Kit with Pillow Ball Upper Mount

The HKS 80300-AT030P Hipermax S is a full adjustable coilover suspension kit engineered for the Toyota GR Corolla (GZEA14H). The "P" suffix denotes the pillow ball upper mount configuration, offering sharper suspension response and improved steering feel compared to the standard rubber-mount variant (80300-AT030). Developed to deliver HKS's benchmark standard of Driving Comfort, this kit balances everyday street usability with genuine performance capability.

Key Specifications:

• Spring Rate: Front 69 N/mm (7 kgf/mm) / Rear 88 N/mm (9 kgf/mm)
• Spring Free Length: Front 200mm (Straight Barrel) / Rear 200mm (Straight)
• Height Adjustment Range: Front +3mm to -39mm / Rear +7mm to -70mm (relative to factory)
• Damping Force Adjustment: 30-step single-way adjustment
• Damper Type: Inverted monotube (front) / Normal monotube (rear)
• Upper Mount: Pillow Ball (front and rear)
• Damping Force at 0.1m/s — Front: Rebound 608N / Compression 564N
• Damping Force at 0.1m/s — Rear: Rebound 761N / Compression 603N
• Warranty: 3 years / 60,000 km

Technology Highlights:

• Single-Tube Monotube Design: Separates gas and oil chambers for consistent, high-quality damping force with a larger piston diameter for stable performance.
• Dual PVS (Dual Preload Valve System): Suppresses unnecessary high-speed damping forces, improving ride comfort without sacrificing handling.
• WR Needle (Wide Range Needle): Improved needle geometry expands the damping adjustment range, enabling clearer and more accessible 30-step tuning from soft street to firm sport settings.
• Advanced Bump Rubber: Specially shaped bump stop reduces body roll while maintaining a compliant ride feel across a wider range of conditions.
• PNE Coating: Proprietary protective coating provides superior corrosion resistance and long-term durability.
• Inverted Front Shock Absorber: Distributes lateral forces over a larger surface area for increased rigidity, while mounting the damper body to the chassis reduces unsprung weight for improved steering response.
• Low Friction Technology: Advanced tribology engineering reduces internal friction for smoother damper action and improved ride quality.
• Shock-Body Length Adjustable: Full-length coilover design allows ride height adjustment without sacrificing suspension travel or spring preload.

• Spanner wrenches
• Damper adjustment tool

The HKS Hipermax S 80300-AT030P is manufactured in Japan and backed by a 3-year warranty, with overhaul service available through HKS for long-term ownership support.