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 – Porsche 997 Carrera 4 (C4)
The Dežru Spec-S coilover system is engineered specifically for the Porsche 997 Carrera 4, an AWD, rear-engine performance platform that demands balanced damping, predictable weight transfer, and mid-corner stability. Designed around the C4’s AWD traction, suspension geometry, and dual-purpose use, the Spec-S delivers a significant improvement in confidence, body control, and on-throttle stability while maintaining everyday usability.
Developed for drivers who daily their 997 C4 but still enjoy spirited street driving, canyon roads, and occasional HPDE track days, the Spec-S features digressive piston valving that provides strong low-speed support during braking, turn-in, and transitions while remaining compliant over surface imperfections. Rather than chasing extreme stiffness, this setup targets a balanced ride frequency in the ~1.9–2.2 Hz range, delivering improved control, grip, and driver feedback.
Fixed-length damper bodies paired with a 25–30 mm adjustable lowered ride height ensure proper suspension stroke and geometry are preserved. This maintains usable bump travel and predictable roll behavior, allowing the C4 to remain stable and confidence-inspiring under both daily driving and aggressive use.
Key Features
-
Digressive monotube dampers for controlled body motion, consistent damping performance, and direct steering feedback.
-
Fixed-length damper bodies with 25–30 mm adjustable lowered ride height to preserve geometry and usable suspension travel.
-
Adjustable damping to fine-tune rebound for daily driving, spirited street use, or HPDE track conditions.
-
250 lb/in front and 450 lb/in rear spring rates, selected to balance the rear-engine weight bias with AWD traction, improving rotation and mid-corner stability without harshness.
-
Linear HyperCoil springs for predictable load transfer and smooth, consistent response throughout suspension travel.
-
Performance upper mounts optimized for NVH control and alignment consistency under load.
-
Hand-built, dyno-matched pairs to ensure precise left-to-right damping consistency.
Performance Character
The Spec-S transforms the Porsche 997 C4 by tightening chassis control and improving stability under braking, cornering, and throttle application, while still preserving daily comfort. The digressive damping profile provides supportive control through initial inputs and transitional weight shifts, paired with controlled compliance that keeps the tires planted as grip levels increase.
The result is a Porsche 997 C4 that feels composed, balanced, and confidence-inspiring, with the control and feedback needed for both aggressive street driving and track days, yet comfortable enough for everyday use.
