HKS Hipermax IV SP Coilovers

2020–2022 Toyota GR Supra A90

80250-AT003D

Overview:

The HKS Hipermax IV SP Coilovers are precision-engineered suspension components designed specifically for the Toyota GR Supra A90 (2020–2022). These coilovers offer full-length adjustability, allowing drivers to fine-tune their suspension stroke ratio without altering vehicle ride height. This unique feature enables optimal control over bump touch timing, improving traction and vehicle posture for both street and track applications. Developed with performance enthusiasts in mind, the Hipermax IV SP enhances launch control effectiveness and reduces 0-100 km/h acceleration times by approximately one second, thanks to improved rear tire traction and minimized wheel spin.

Whether you are a dedicated track driver or a spirited street enthusiast, these coilovers provide a balanced combination of adjustability, durability, and performance to elevate your GR Supra’s handling capabilities.

Key Features:

The HKS Hipermax IV SP Coilovers incorporate advanced suspension technology and thoughtful design elements to maximize performance and adjustability:

• Full-length adjustable suspension allowing stroke ratio (bump touch timing) changes without affecting vehicle height
• Rear shock length adjustability to delay bump touch timing and increase nose-up angle for improved launch traction
• Single tube shock body with 30 levels of adjustable damping for precise tuning
• Inverted front strut design for enhanced rigidity and smooth stroke performance
• Front pillow upper mounts with camber angle adjustment of approximately 1 degree to reduce understeer on the circuit
• Special outer cover design to ensure stroking amount and height adjustment range
• Billet aluminum rear upper mounts with laser marking for weight savings without compromising strength
• Straight wound springs front and rear for easy spring rate changes
• Special oil and PNE coating for durability and consistent performance
• Overhaul and specification change options available

Construction & Design:

HKS has engineered the Hipermax IV SP Coilovers with a focus on strength, precision, and lightweight construction. The front suspension features an inverted strut design that maintains high rigidity without requiring oversized main shafts, allowing for smooth, consistent stroke behavior. The front pillow upper mounts are crafted from steel plates to ensure durability while enabling camber adjustments to optimize handling balance.

The rear suspension employs billet aluminum upper mounts that have been meticulously laser marked and weight-optimized without sacrificing structural integrity. The coil springs are straight wound, facilitating straightforward spring rate swaps to suit different driving conditions. Additionally, the rear shocks include bump rubbers that act as auxiliary springs to handle increased power and grip demands, enhancing rear tire traction during aggressive launches and cornering.

Performance & Sound

The HKS Hipermax IV SP Coilovers are designed to improve the GR Supra’s launch control system by maximizing rear tire traction and minimizing wheel spin during acceleration. Internal testing demonstrated a significant reduction in 0-100 km/h times by approximately one second compared to stock suspension settings. This performance gain is achieved through precise control of bump touch timing and vehicle posture, allowing the driver to exploit the Supra’s powertrain more effectively. While primarily focused on handling and traction, the coilovers also contribute to a more connected and responsive driving experience without introducing unwanted noise or harshness.

Installation & Fitment:

These coilovers are a direct fit for the Toyota GR Supra A90 models from 2020 through 2022. Installation requires standard suspension removal and replacement procedures, with no major modifications necessary. The adjustable features allow for fine-tuning after installation to match driver preferences and specific track or road conditions. The front pillow upper mounts enable camber adjustments without altering the factory strut position, simplifying setup for improved handling balance.

What's Included:

• Front and rear coilover assemblies with adjustable damping and height
• Front pillow upper mounts with camber adjustment capability
• Rear billet aluminum upper mounts with laser marking
• Straight wound springs (Front: 59 N/mm, Rear: 98 N/mm)
• Special oil and PNE coating applied to shocks
• Installation hardware and adjustment tools

Ideal For:

The HKS Hipermax IV SP Coilovers are ideal for Toyota GR Supra owners seeking enhanced handling performance, especially those who participate in track days, drag racing, or spirited driving. They are perfect for enthusiasts who want to improve launch traction, reduce understeer, and customize suspension settings without compromising ride quality or vehicle height. This suspension upgrade is also suitable for drivers planning future power increases, as the coilovers are designed to handle higher grip and power levels reliably.