Description

The HKS HIPERMAX R is the pinnacle of coilover performance, engineered for the ultimate dual-purpose driving experience on the GR Yaris Gen2. Designed for drivers who demand maximum control from circuit to backroad, it offers sharp, tactile feedback, immense roll stiffness, and the high-speed stability needed to exploit high-grip tires. With a revised, firmer damping character to match the car’s increased rigidity and power, this system unlocks a new level of precision, allowing you to explore the limits with confidence while maintaining enough compliance for spirited road driving.

Product Overview & Purpose

Built for the serious performer, the HIPERMAX R transforms the GR Yaris into a poised, direct, and incredibly responsive track weapon. It replaces the softer, more comfort-biased OEM tuning with a motorsport-derived philosophy, prioritizing chassis control, turn-in sharpness, and cornering stability. Developed and tested on Fuji Speedway, it provides a proven, out-of-the-box performance baseline for aggressive driving.

Product Highlights

🏁 Circuit-Optimized Performance & Setup

• Track-Tuned Damping & Springs: Developed on Fuji Speedway with high-grip ADVAN A052 tires (265/35-18). Includes specific recommended alignment and damper settings (F:7, R:6 clicks) to provide a proven, competitive starting point for circuit use.

• Increased Roll Rigidity & High-Speed Stability: The rear spring rate has been increased versus the previous generation to provide exceptional roll control. This tuning allows for earlier and more aggressive throttle application in high-speed corners, translating to faster lap times.

• Precision Inverted Front Design: Features an inverted front damper for reduced unsprung weight and improved rigidity at the critical steering knuckle, enhancing steering feel and responsiveness.

🛣️ Dual-Purpose Refinement with Adjustability

• 30-Step Damping Adjustment (F/R): Offers a wide tuning range. While optimized for firm performance, the SOFT side of the range is carefully calibrated to absorb high-frequency impacts and vibrations, making driving to and from the track manageable.

• Full-Length Ride Height & Spring Preload Adjustment: Allows for precise corner balancing and the achievement of an optimal, low center of gravity while maintaining proper damper stroke.

🔧 Professional-Grade Construction & Compatibility

• Pillow ball Upper Mounts (F/R): Provide direct, unfiltered steering feedback and allow for significant camber adjustment (tested up to -4°40′ front).

• Specific for Gen2 MT: Engineered exclusively for the 2024+ Gen2 GR Yaris 4WD Manual Transmission, taking into account its increased body rigidity and performance character.

• Helper Springs: Included to maintain spring tension at full droop, ensuring consistent performance over bumps and during weight transfer.

Technical Specifications

• Product Name: HIPERMAX R

• Model Code: 80310-AT008

• Compatibility: Toyota GR Yaris (4BA-GXPA16, G16E-GTS, April 2024+ Gen2, MT 4WD ONLY).

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

• Construction: Front Inverted / Rear Upright Monotube

• Upper Mount: Front & Rear Pillow ball

• Full-Kit Spring Rates:

  • Front: 118 N/mm (12.0 kgf/mm)

  • Rear: 177 N/mm (18.0 kgf/mm)

• Key Feature: Includes proven Fuji Speedway circuit setup data.

■Configuration diagram　*Subject to change due to specification changes.

Performance Philosophy

• Goal: To provide the highest level of chassis control and driver feedback for circuit driving and aggressive backroad use, with just enough compliance for practical transport. The focus is on limit exploration, predictability, and ultimate grip.

• Focus: The definitive coilover for the track-focused GR Yaris. It is designed for owners who regularly visit circuits or drive at ten-tenths on challenging roads, and who are willing to pair it with sticky tires and aggressive alignment to fully realize its potential.

Installation & Tuning Notes

• 🔧 Professional Installation, Alignment, & Corner Balancing REQUIRED
  To achieve the intended performance and safety, installation must be performed by a professional shop. A precision performance alignment and corner balance are not optional—they are critical to realizing the system’s capabilities and preventing interference or damage.

• ⚠️ Critical Setup & Compatibility Warnings

  • Extreme Alignment: The tested aggressive camber (-4°40′ front) may cause the upper pillowball mount to contact the body. Careful inspection and adjustment are required.

  • Wheel/Tire Fitment: With lowered ride height and aggressive negative camber, tire-to-fender interference is likely with wide wheels and tires. Test fitment carefully.

  • Use Provided Data: The Fuji Speedway damper, ride height, and alignment settings are an invaluable starting point. Deviate from them only with purpose and understanding.