Balanced daily comfort with real back-road capability.
Designed to lower your car by approximately 25–30 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 – 2009–2016 Audi A4
The Dežru Spec-S coilover system is engineered specifically for the 2009–2016 Audi A4, a chassis that blends everyday usability with genuine performance potential. Designed around the A4’s suspension geometry, weight distribution, and real-world driving conditions, the Spec-S delivers improved control and confidence without sacrificing ride quality.
Developed for drivers who daily their A4 but still enjoy spirited back-road driving and occasional HPDE track days, the Spec-S features digressive piston valving that provides strong low-speed chassis support during braking, turn-in, and transitions, while remaining compliant over uneven pavement and expansion joints. Rather than chasing excessive stiffness, this setup targets a balanced ride frequency in the ~2.0–2.2 Hz range, offering stability and feedback without harshness.
Fixed-length damper bodies paired with a 25–30 mm adjustable lowered ride height ensure proper suspension stroke and geometry are maintained. This approach preserves usable bump travel and consistent roll behavior, allowing the A4 to remain predictable, composed, and confidence-inspiring during both daily driving and aggressive use.
Key Features
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Digressive monotube dampers for controlled body motion, consistent damping performance, and clear driver feedback.
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Fixed-length damper bodies with 25–30 mm adjustable lowered ride height to preserve suspension geometry and usable travel.
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Adjustable damping to fine-tune rebound for daily driving, canyon roads, or HPDE track events.
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450 lb/in front and 700 lb/in rear spring rates, selected to balance front-end control with rear stability for a true street and track blend.
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Linear HyperCoil springs for predictable load transfer and smooth, consistent response throughout suspension travel.
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OEM-style upper mounts to reduce NVH while maintaining proper fitment and alignment consistency.
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Hand-built, dyno-matched pairs to ensure precise left-to-right damping consistency.
Performance Character
The Spec-S enhances the Audi A4’s composure by reducing excessive body motion while preserving comfort and traction. The digressive damping profile delivers firm, supportive control during initial inputs and transitions, paired with controlled compliance that keeps the tires planted as grip levels increase.
The result is a balanced, refined, and confidence-inspiring driving experience that remains comfortable for daily use, yet stable and responsive when pushed hard.
