Balanced chassis control without ruining what makes a Miata fun.
The Spec-S sharpens steering response, reduces excess body motion, and improves composure during aggressive driving while remaining comfortable enough for real-world street use.
Dežru Spec-S Coilovers – Mazda MX-5 Miata (NC Chassis)
The Dežru Spec-S coilover system for the 2006–2015 Mazda MX-5 Miata NC was engineered specifically around the unique balance of the NC chassis: lightweight, responsive, and incredibly rewarding when paired with properly controlled suspension.
Unlike overly stiff “track style” coilovers that sacrifice compliance for the illusion of performance, the Spec-S focuses on maintaining tire contact, improving chassis composure, and delivering predictable handling over real pavement. The result is a suspension system that feels planted and responsive without becoming harsh or nervous during daily driving.
Designed for drivers who enjoy spirited street driving, autocross, canyon roads, and occasional HPDE events, the Spec-S uses carefully developed digressive damping profiles to improve body control during braking, transitions, and cornering while remaining compliant over rough pavement and uneven surfaces.
Rather than relying on excessive spring stiffness alone, the Spec-S balances spring rate, damping force, and usable suspension stroke to create a Miata that feels sharper, more stable, and significantly more confidence inspiring.
Recommended Spring Package
700 Front / 400 Rear – Street & Autocross Package
After extensive testing and development, we recommend a 700 lb/in front and 400 lb/in rear spring package for the NC Miata when targeting the best overall balance between street comfort, transitional response, autocross capability, and chassis composure.
The NC chassis responds extremely well to additional front spring support, helping improve steering precision, reduce body roll, and maintain front-end grip during aggressive turn-in and rapid transitions. Pairing this with a properly balanced rear spring rate keeps the car neutral and predictable without becoming overly loose or unstable.
This setup delivers:
- Sharper steering response and improved turn-in
- Reduced body roll and brake dive
- Improved transitional behavior during autocross
- Greater confidence during high-speed cornering
- Excellent street manners without excessive harshness
- Balanced and predictable chassis behavior at the limit
Combined with the Spec-S digressive valving, this spring package provides strong low-speed chassis control while still allowing the suspension to absorb imperfections instead of crashing over them.
Key Features
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Digressive monotube dampers for improved chassis support and predictable handling response.
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Fixed-length damper bodies with independent ride height adjustment to preserve usable suspension travel.
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20-click rebound adjustment to fine-tune comfort and response for different driving styles and road conditions.
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700 lb/in front and 400 lb/in rear spring rates, optimized for aggressive street driving and autocross performance.
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Linear performance springs for predictable weight transfer and consistent chassis behavior.
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Nickel-plated shock bodies for improved corrosion resistance and durability.
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Hand-built and dyno-matched dampers to ensure precise left-to-right consistency.
Performance Character
The Spec-S transforms the NC Miata into a more composed and confidence-inspiring chassis while preserving the communication and playfulness that makes the platform enjoyable in the first place.
The digressive damping profile provides immediate support during steering inputs and rapid weight transfer, paired with enough compliance to keep the tires planted over imperfect pavement and mid-corner bumps.
The result is a Miata that feels sharper and more connected without becoming exhausting to drive every day.
Instead of feeling artificially stiff, the car feels controlled, planted, and eager to change direction while still maintaining the mechanical grip and balance that make the Miata platform so rewarding.
