Description
The Dežru Spec-S Coilover System is engineered for the Toyota GR Supra A90, delivering a street-focused performance suspension setup designed to balance precise chassis control, responsive handling, and everyday drivability. Developed for the Supra's rear-wheel-drive platform, the Spec-S combines digressive monotube dampers, linear-rate HyperCoil springs, and adjustable damping to help drivers achieve a more controlled and engaging driving experience.
Designed for enthusiasts who enjoy daily driving as well as spirited back-road driving and occasional high-performance driving events (HPDE), the Spec-S emphasizes predictable suspension response rather than uncompromising track stiffness. Its digressive piston valving is designed to provide supportive low-speed damping during braking, steering inputs, cornering, and rapid transitions while retaining compliance over uneven pavement and expansion joints.
The system features fixed-length damper bodies and approximately 25–30 mm of adjustable lowering, offering a more aggressive stance while aiming to retain useful suspension travel and predictable handling. Adjustable damping allows drivers to fine-tune suspension response to suit their preferred balance of comfort and control.
With specified spring rates of 500 lb/in front and 800 lb/in rear, the Spec-S is configured around a performance-oriented spring combination intended to provide increased chassis support. Because these rates are relatively firm, particularly at the rear, the final ride quality and handling balance will depend on damper tuning, suspension geometry, tire selection, alignment, and ride height.
Key Features
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Digressive Monotube Dampers: Designed to provide controlled body movement and responsive damping during braking, cornering, and directional changes.
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Adjustable Damping: Allows suspension response to be fine-tuned for daily driving, spirited street use, and occasional HPDE events.
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Fixed-Length Damper Bodies: Engineered to support consistent suspension operation within the intended ride-height range.
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Adjustable Ride Height: Provides approximately 25–30 mm of lowering for a sportier stance and a lower center of gravity.
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Performance-Oriented Spring Rates: Features 500 lb/in front and 800 lb/in rear springs, as specified for this application, to support chassis control and manage suspension movement.
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Linear HyperCoil Springs: Designed to deliver predictable spring response throughout suspension travel.
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OEM-Style Upper Mounts: Intended to help retain a refined driving character while minimizing unnecessary noise, vibration, and harshness (NVH).
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Hand-Built, Dyno-Matched Dampers: Prepared in matched pairs to promote consistent damping characteristics from side to side.
Performance Character
The Dežru Spec-S is designed to make the A90 Supra feel more controlled and composed during demanding street driving and performance use. Its digressive damping profile aims to provide support during initial steering inputs and weight transfer, helping manage body movement during braking, cornering, and rapid transitions.
The specified spring rates are intended to provide substantial suspension support for enthusiastic driving. The front springs aim to manage suspension compression under braking and steering loads, while the rear springs provide a firmer foundation for controlling rear suspension movement. However, spring rates alone do not determine cornering balance, traction, squat, or understeer; these characteristics also depend on suspension geometry, damper calibration, anti-roll bars, alignment, and tires.
For daily use, the adjustable damping provides flexibility to tailor the suspension response to road conditions and personal preferences. For occasional HPDE events, the setup is designed to offer a more controlled platform, provided the spring rates and damping are appropriately matched to the vehicle and intended use.
Why Choose 500 lb/in Front and 800 lb/in Rear Spring Rates?
The Toyota GR Supra A90 is a rear-wheel-drive sports car with a chassis designed to deliver a balance of agility, stability, and everyday usability. For drivers seeking a more performance-oriented suspension setup, spring selection plays an important role in controlling body movement and shaping suspension response.
The Spec-S uses 500 lb/in front and 800 lb/in rear spring rates to provide a firm, performance-focused spring combination.
Front suspension — 500 lb/in
The front springs are designed to provide support during braking, steering inputs, and cornering. When correctly matched to the dampers and suspension geometry, they can help manage front suspension compression and contribute to a more controlled response.
Rear suspension — 800 lb/in
The higher rear spring rate provides a firmer spring platform intended to control rear suspension movement. Its effects on acceleration squat, traction, and cornering balance depend on the complete suspension setup and the vehicle's load-transfer characteristics.
Intended setup goals:
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Improve control of suspension movement during aggressive driving.
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Provide a firmer platform during braking and cornering transitions.
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Support responsive chassis behavior on winding roads and track sessions.
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Allow damping adjustments to suit different driving conditions.
The Spec-S combines these springs with digressive damping, which is designed to deliver supportive control during initial suspension movement while maintaining compliance where possible. Because the rear spring rate is relatively high, confirm that the resulting setup meets the intended street-comfort and track-use requirements.
Ride Height and Suspension Setup
The Spec-S offers approximately 25–30 mm of adjustable lowering compared with factory ride height. This moderate drop creates a more purposeful stance while aiming to preserve practical ground clearance and usable suspension travel.
After installation, a professional alignment is recommended. Ride height should be set within the manufacturer's approved adjustment range, with tire clearance, suspension travel, and component clearance checked before the vehicle is driven aggressively.
Who Is It For?
The Dežru Spec-S Coilover System is suited to Toyota GR Supra owners who want:
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More controlled suspension movement during spirited driving.
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Adjustable damping to tailor suspension response.
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A moderately lowered stance.
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A performance-oriented setup for winding roads and occasional HPDE use.
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A firmer, more controlled chassis feel than a comfort-focused suspension setup.
Vehicle Fitment
Vehicle: Toyota GR Supra A90
Platform: A90
Front Spring Rate: 500 lb/in
Rear Spring Rate: 800 lb/in
Damper Type: Digressive monotube
Damping: Adjustable
Ride-Height Adjustment: Approximately 25–30 mm below OEM height
Springs: Linear-rate HyperCoil
Upper Mounts: OEM-style
Damper Matching: Hand-built, dyno-matched pairs
Fitment note: Confirm compatibility with the exact model year, engine, transmission, and factory suspension configuration before ordering.
Disclaimer: This product is built to order. Please allow approximately 3–4 weeks for production before shipment.
