Maximum adjustability for drivers who demand control.
The Spec-R lowers the Ferrari 355 by approximately 25–30 mm while delivering true 3-way damper control, allowing precise tuning for aggressive street driving and serious track use.
Dežru Spec-R Coilovers – 1994–1999 Ferrari F355 (F129)
Modern race-bred damping for Ferrari’s most analog chassis:
The Dežru Suspension Spec-R system is the most capable suspension offering for the Ferrari F355. Designed for drivers who actively tune their setup, the Spec-R introduces full 3-way damper adjustability while preserving the communication and balance that define the F355 driving experience.
Each Spec-R kit is engineered using real-world vehicle data including corner weights, motion ratios, and target ride frequencies. The result is a suspension system that responds clearly to adjustment changes and allows the driver to tailor the car for road, track, or mixed-use conditions without compromise.
Key Features
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True 3-way adjustability with independent high-speed compression, low-speed compression, and rebound control.
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Digressive monotube piston design provides firm chassis support while maintaining clarity and feedback at the limit.
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Linear HyperCo springs selected to match the F355’s mid-engine weight distribution and suspension geometry.
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CNC-machined mounts and hardware ensure precise fitment and long-term durability.
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Hand-built and shock dyno validated to guarantee consistent damping curves across all four dampers.
Performance Character
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Front spring rate: tuned for immediate response and confidence under heavy braking and turn-in.
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Rear spring rate: calibrated to maintain traction and stability under throttle while preserving mid-corner balance.
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Adjustment range: wide enough to support smooth road setups or aggressive track-focused configurations.
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Intended use: spirited street, track days, and advanced driver applications.
Why Choose Dežru Spec-R
The Ferrari F355 rewards precision and commitment. The Spec-R exists for owners who want direct control over how their car behaves in every phase of a corner. With its 3-way adjustable architecture and data-driven tuning philosophy, the Spec-R unlocks the full potential of the F355 while respecting the soul of a truly analog Ferrari.
