Refined control with real-world comfort and AWD stability.
Designed to lower your car by approximately 25–50 mm while maintaining composure over real-world roads, the Spec-S sharpens turn-in and body control without beating you up on the commute.
Dežru Spec-S Coilovers – Ford Focus RS (2015–2018)
The Dežru Spec-S coilover system is engineered specifically for the 2015–2018 Ford Focus RS, a high-performance AWD platform known for its grip, power delivery, and aggressive driving capability. While the factory suspension offers strong performance, it can feel overly stiff in some conditions while still allowing body movement and imbalance during real-world driving.
The Spec-S is designed to refine the Focus RS by improving chassis control and balance without sacrificing everyday usability. Built for drivers who want better composure, improved ride quality, and increased confidence on the street, this system delivers a more predictable and controlled driving experience.
Utilizing digressive piston valving, the Spec-S provides strong low-speed damping to control body motion during braking, acceleration, and cornering, while remaining compliant over uneven pavement and harsh road conditions. Rather than relying on excessive spring stiffness, this setup targets a balanced ride frequency in the ~1.9–2.2 Hz range, ideal for a high-performance AWD street car.
Fixed-length damper bodies are designed to preserve suspension travel and maintain proper geometry, ensuring consistent handling and predictable behavior under all driving conditions.
Key Features
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Digressive monotube dampers for improved body control, consistent performance, and clear driver feedback.
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Fixed-length damper design to preserve suspension travel and maintain proper geometry.
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Adjustable damping to fine-tune ride quality and responsiveness.
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400 lb/in front and 500 lb/in rear spring rates, selected to improve balance, reduce understeer, and enhance rear stability under load.
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Linear HyperCoil springs for predictable load transfer and consistent performance.
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OEM-style upper mounts to minimize noise, vibration, and harshness.
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Hand-built, dyno-matched pairs for consistent damping performance.
Performance Character
The Spec-S transforms the Focus RS by improving overall chassis composure and reducing unwanted body motion. The vehicle feels more planted through corners, more stable under braking, and more predictable during transitions.
The higher rear spring rate helps balance the AWD chassis, reducing the tendency to push and improving rotation, while the front rate maintains compliance and grip for confident steering response. This results in a more neutral, controlled feel without sacrificing ride comfort.
Combined with digressive damping, the system delivers a smooth, controlled ride that adapts well to real-world driving conditions, making the Focus RS more enjoyable and confidence-inspiring both daily and during spirited driving.
Why We Recommend 400 lb/in Front & 500 lb/in Rear
The Focus RS features a front-biased AWD system and a front-heavy weight distribution, which can lead to understeer and front-end push when driven aggressively.
Our 400 / 500 spring rate setup is designed to correct that imbalance while maintaining street-friendly comfort. The 500 lb/in rear spring increases rear stability and helps the chassis rotate more naturally, reducing understeer and improving mid-corner balance.
Up front, the 400 lb/in spring provides strong support under braking and turn-in while maintaining enough compliance to preserve grip and ride quality.
The result is a setup that:
- Reduces body roll and front-end push
- Improves balance and cornering response
- Enhances rear stability and rotation
- Maintains a comfortable, usable ride for daily driving
Overall, 400 front / 500 rear gives the Focus RS a more balanced, planted, and confidence-inspiring feel, while preserving the usability expected from a high-performance street car.
