Description
The Dežru Spec-S Coilover Suspension System is designed for the Porsche 911 (996) Carrera 4 (C4), delivering a performance-oriented balance of improved chassis control, predictable handling, and everyday driving comfort. Developed around the 996's rear-engine layout and all-wheel-drive configuration, this suspension upgrade helps reduce excessive body movement, sharpen steering response, and improve stability during braking, cornering, and acceleration.
Featuring digressive monotube dampers, the Spec-S system provides strong low-speed damping support during turn-in, braking, and directional transitions while maintaining controlled compliance over uneven pavement. This design helps the suspension respond confidently to driver inputs without relying on excessive stiffness, making it suitable for daily driving, spirited road use, and occasional high-performance driver education (HPDE) track days.
The system combines 250 lb/in front springs and 450 lb/in rear springs to balance front-end responsiveness with the rear support required by the 996's rear-engine platform. When paired with appropriately tuned dampers, these spring rates help manage weight transfer, reduce excessive squat under acceleration, and promote stable, predictable handling.
With an adjustable lowered ride height of approximately 25–30 mm, the Spec-S allows drivers to achieve a sportier stance while aiming to preserve usable suspension travel and predictable handling geometry. Fixed-length damper bodies are designed to work with the intended ride-height range, while linear HyperCoil springs provide consistent and predictable support throughout suspension travel.
The system features OEM-style upper mounts to help retain a street-friendly ride and reduce noise, vibration, and harshness (NVH) compared with many solid-mounted alternatives. Each damper is hand-built and dyno-matched to help maintain consistent damping characteristics from side to side.
Key Features
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Vehicle application: Porsche 911 (996) Carrera 4 (C4), subject to confirmation of exact model-year compatibility.
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Digressive monotube dampers: Deliver controlled body motion, responsive chassis support, and consistent damping performance.
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Adjustable damping: Allows suspension response to be fine-tuned for daily driving, spirited street use, and occasional track events.
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Adjustable lowered ride height: Approximately 25–30 mm of lowering for a sportier stance and a lower center of gravity.
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Performance spring rates: 250 lb/in front and 450 lb/in rear.
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Linear HyperCoil springs: Provide predictable spring response and consistent support throughout suspension travel.
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Fixed-length damper bodies: Designed to work with the specified lowered ride-height configuration.
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OEM-style upper mounts: Help maintain a more street-oriented ride with reduced suspension-related NVH.
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Hand-built, dyno-matched dampers: Promote consistent damping characteristics across the suspension.
Performance Benefits
The Dežru Spec-S coilovers help the Porsche 996 Carrera 4 feel more composed during braking, cornering, and acceleration. The digressive damping profile provides support during initial steering inputs and weight transfer while allowing controlled suspension movement over imperfect road surfaces.
The 250 lb/in front and 450 lb/in rear spring combination is intended to balance front-end response with the rear suspension support required by the 996's rear-engine layout. Combined with the C4's all-wheel-drive system, a properly configured suspension can help deliver predictable handling and increased confidence when accelerating out of corners.
Adjustable damping and ride height provide flexibility for drivers seeking a lower stance and sharper chassis response without making the vehicle exclusively track-oriented. Actual results depend on suspension settings, wheel alignment, tires, and overall vehicle condition.
Vehicle Fitment
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Make: Porsche
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Model: 911 Carrera 4
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Chassis: 996
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Trim: Carrera 4 (C4), all-wheel drive
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Model years: Confirm the exact compatible year range with the supplier before listing.
Fitment note: Verify compatibility with the specific model year and factory suspension configuration. Do not assume fitment for Carrera 2 (C2), Carrera 4S (C4S), Turbo, or other variants unless separately confirmed.
Disclaimer: This product is built to order. Please allow approximately 3–4 weeks for production before shipment.
