Description
The Dežru Spec-RS Coilover System is designed for the second-generation Acura NSX, delivering a track-focused suspension upgrade intended to improve chassis control, steering response, and stability under demanding driving conditions. Developed for the NSX's mid-engine layout and Sport Hybrid SH-AWD powertrain, the Spec-RS combines digressive monotube dampers, linear-rate HyperCoil springs, and adjustable damping to provide a more controlled and responsive driving experience.
Designed for enthusiasts who demand precise handling on spirited road drives and during high-performance driving events (HPDE), the Spec-RS emphasizes controlled body movement and predictable suspension response. Its digressive piston valving is designed to provide substantial damping support during braking, cornering, and rapid transitions while allowing the suspension to respond to road irregularities.
The system uses 500 lb/in front and 650 lb/in rear spring rates, as specified for this application, to provide a firm, performance-oriented spring setup. When properly matched to the dampers, suspension geometry, tires, and alignment, this combination is intended to support the NSX during high-load driving while maintaining usable suspension movement.
The Spec-RS is intended for drivers seeking a more direct, controlled chassis response than a comfort-oriented suspension setup. Final ride quality and performance will depend on damper adjustments, ride height, tire selection, alignment, and the vehicle's specific configuration.
Key Features
-
Digressive Monotube Dampers: Designed to deliver controlled body movement and responsive damping during braking, cornering, and directional changes.
-
Track-Focused Damping Calibration: Intended to support consistent suspension control during demanding street driving and repeated performance use.
-
Adjustable Damping: Allows rebound characteristics to be fine-tuned for road, canyon, and track conditions.
-
Performance-Oriented Spring Rates: Features 500 lb/in front and 650 lb/in rear springs, as specified for this application, to provide firm suspension support.
-
Linear HyperCoil Springs: Designed to provide predictable spring response and consistent support throughout suspension travel.
-
Hand-Built, Dyno-Matched Dampers: Prepared in matched pairs to promote consistent damping characteristics from side to side.
-
OEM Upper Mount Reuse: Factory upper mounts are retained and must be transferred from the original suspension assemblies during installation.
-
OEM Front Lower Fork Reuse: The original front lower shock forks must be transferred to the Dežru coilover assemblies.
-
Electronic Damper Control Bypass Required: The factory electronically controlled dampers are replaced. An appropriate EDC cancellation or bypass solution is required as specified by the manufacturer.
Performance Character
The Dežru Spec-RS is designed to deliver a more controlled and responsive suspension feel for the second-generation Acura NSX. Its digressive damping profile aims to provide support during initial suspension movement, helping manage body motion under braking, cornering, and rapid changes in direction.
The specified spring rates provide a firm foundation intended for performance-oriented driving. The front springs aim to support the chassis during braking and steering inputs, while the higher rear spring rate is intended to provide additional support for rear suspension loads. The resulting handling balance depends on the complete suspension system, including damper calibration, geometry, anti-roll bars, alignment, tires, and ride height.
For HPDE and track use, the Spec-RS is designed to provide a more controlled platform during demanding cornering and transitions. However, spring rates and digressive damping alone do not guarantee improved lap times, traction, or thermal consistency; these outcomes depend on the full setup and operating conditions.
Why Choose 500 lb/in Front and 650 lb/in Rear Spring Rates?
The second-generation Acura NSX combines a mid-mounted engine with a hybrid all-wheel-drive system, creating suspension requirements that differ from those of many conventional sports cars. Spring selection must account for axle loading, suspension geometry, motion ratios, damper tuning, and the intended balance between road and track performance.
The Spec-RS uses 500 lb/in front and 650 lb/in rear spring rates to provide the firm, performance-oriented spring combination specified for this application.
Front suspension — 500 lb/in
The front springs are designed to support the chassis during braking, steering inputs, and cornering. When properly matched to the damper calibration and suspension geometry, they can help manage front suspension compression and contribute to a more controlled steering response.
Rear suspension — 650 lb/in
The higher rear spring rate is intended to provide additional support for rear suspension movement under cornering and acceleration loads. Its effects on squat, traction, and cornering balance depend on the complete suspension setup and the vehicle's load-transfer characteristics.
Intended setup goals:
-
Improve control of body movement during braking and cornering.
-
Provide a firmer platform during rapid directional changes.
-
Support a more controlled chassis response during high-load driving.
-
Allow damping adjustments to be tailored to road and track conditions.
The Spec-RS pairs these spring rates with digressive damping, which is designed to balance low-speed chassis support with suspension response to road irregularities. The final balance of ride comfort, grip, and track performance should be evaluated with the complete vehicle setup.
Installation Requirements
Factory upper mounts must be reused. The original upper mounts must be transferred from the factory suspension assemblies to the Dežru coilovers during installation.
Factory front lower shock forks must be reused. The original front lower forks must be transferred to the new assemblies as specified by the manufacturer.
Electronic damper control bypass is required. The Spec-RS replaces the factory electronically controlled dampers with conventional performance dampers. An appropriate cancellation module or bypass solution must be installed according to the manufacturer's instructions to address potential suspension warning messages or fault codes. Factory electronic damping adjustment will no longer operate through the replaced dampers.
Professional installation is strongly recommended. Before ordering, confirm all required transfer components, electronic bypass hardware, and installation procedures with Dežru or an NSX-experienced installer.
Who Is It For?
The Dežru Spec-RS Coilover System is suited to Acura NSX owners who want:
-
A firmer, performance-oriented suspension setup.
-
More controlled body movement during braking and cornering.
-
Adjustable damping for road and track use.
-
A more direct chassis response during spirited driving.
-
A suspension system intended for occasional or regular HPDE use, subject to appropriate setup.
Vehicle Fitment
Vehicle: Acura NSX
Model Years: 2017–2022, subject to manufacturer confirmation
Generation: Second generation
Front Spring Rate: 500 lb/in
Rear Spring Rate: 650 lb/in
Damper Type: Digressive monotube
Damping: Adjustable
Springs: Linear-rate HyperCoil
Upper Mounts: Factory mounts reused
Front Lower Forks: Factory components reused
Electronic Damper Control: Bypass or cancellation solution required
Fitment note: Confirm compatibility with the exact model year and vehicle configuration, along with all required mounting hardware and electronic bypass components, before ordering.
Disclaimer: This product is built to order. Please allow approximately 3–4 weeks for production before shipment.
