Product Overview & Purpose

Designed for the enthusiast who uses their GR Corolla every day, the HIPERMAX S prioritizes a qualitative transformation in ride quality and noise isolation over extreme track performance. It replaces the stock suspension’s sometimes harsh feel with a damped, “sticky” composure that absorbs imperfections and reduces cabin noise, creating a more refined and enjoyable grand tourer. It is the intelligent choice for enhanced real-world enjoyment, backed by a comprehensive 3-year / 60,000 km warranty.

Product Highlights

🛋️ Redefining “Driving Comfort” – Smooth & Composed
The HIPERMAX S philosophy prioritizes a smooth, refined, and comfortable daily driving experience. It eliminates harshness and unnecessary body motion, transforming the GR Corolla into a more sophisticated and enjoyable companion, without dulling its sporty character.

📐 Precision Damping for Refined Control
Leveraging the benefits of large-diameter pistons, HKS engineered a damping profile that provides sharp initial response for precise handling while meticulously controlling high-speed damping to prevent stiffness over bumps. The result is a ride that feels both taut and supple, absorbing impacts gracefully.

🌊 Meticulously Tuned Spring Rates for Perfect Balance
Spring rates were carefully selected to complement the GR Corolla’s weight and dynamics (69 N/mm F, 88 N/mm R). This calibration provides a meaningful increase in roll control and stability over stock while maintaining excellent compliance for comfort.

🎛️ Wide-Range Adjustability for Personalized Driving

• 30-Step Damping Adjustment (F/R): Easily tune from a plush, comfortable setting to a firmer, more responsive feel for backroad driving.

• Full-Length Ride Height Adjustment: Achieve your desired stylish lowering (approx. -14mm F / -25mm R at shipment settings) while maintaining proper damper stroke for performance and reliability.

🛡️ Long-Term Reliability & Support
HKS stands behind the durability of the HIPERMAX S with a robust 3-year / 60,000 km warranty. This is complemented by full overhaul support and after-sales service, ensuring it is a long-term investment you can trust.

Technical Specifications

• Product Name: HIPERMAX S

• Model Code: 80300-AT030

• Compatibility: Toyota GR Corolla (GZEA14H, G16E-GTS, December 2022+). Verified on RZ grade. Not confirmed for Morizo Edition.

• Damping Adjustment: 30-step (Front & Rear)

• Construction: Front Inverted / Rear Upright Monotube

• Upper Mount: Front & Rear Reinforced Rubber

• Full-Kit Spring Rates:

  • Front: 69 N/mm (7.0 kgf/mm)

  • Rear: 88 N/mm (9.0 kgf/mm)

• Warranty: 3-year / 60,000 km.

• Key Feature: Balanced street performance with comprehensive warranty.

Performance Philosophy

• Goal: To provide a significant, holistic upgrade in ride quality, composure, and style over the stock suspension, while retaining enough performance intent for enjoyable backroad and occasional light track use. The focus is on smoothness, refinement, and daily driving pleasure.

• Focus: The ideal daily-driver performance coilover. It is the perfect choice for owners who want their GR Corolla to be more comfortable and refined on the highway, more composed on bumpy backroads, and more stylish at a standstill—all without the harshness of race-oriented suspensions.

■ Configuration diagram

Installation & Tuning Notes

• 🔧 Professional Installation & Alignment Recommended
  For optimal ride quality, performance, and to preserve the warranty, professional installation and a precision alignment are essential. Use the provided ride height and alignment data as a proven starting point.

• ⚙️ Dialing in Your Preference

  • For maximum comfort over large bumps, HKS recommends applying front preload to ensure sufficient bump stroke.

  • For more spirited driving, adjust the damping towards firmer settings.