Description
The Dežru Spec-S Coilover Suspension System is engineered for the Porsche 911 (997) Carrera 4 (C4), delivering a performance-focused balance of chassis control, all-wheel-drive stability, and everyday driving comfort. Designed around the 997's rear-engine layout and all-wheel-drive drivetrain, this suspension upgrade helps improve cornering confidence, steering response, and stability under braking and acceleration while preserving the compliance needed for street use.
Featuring digressive monotube dampers, the Spec-S system provides controlled low-speed damping during braking, turn-in, and directional transitions while remaining compliant over uneven road surfaces. This design helps manage body movement without relying on excessive stiffness, making the setup suitable for daily driving, spirited back-road use, and occasional high-performance driver education (HPDE) track days.
The system uses 250 lb/in front springs and 450 lb/in rear springs, selected to provide front-end responsiveness and rear suspension support suited to the 997's rear-engine configuration. When matched with appropriately tuned dampers, these spring rates help control weight transfer, reduce excessive rear squat under acceleration, and maintain predictable handling through corners.
With an adjustable lowered ride height of approximately 25–30 mm, the Spec-S allows drivers to achieve a more aggressive stance while aiming to preserve usable suspension travel and predictable suspension geometry. Fixed-length damper bodies are designed to work with the intended ride-height range, while linear HyperCoil springs provide consistent, predictable support throughout suspension travel.
The system also features performance upper mounts designed to support alignment consistency and chassis control under load. Each damper is hand-built and dyno-matched to help deliver consistent damping characteristics from side to side.
Key Features
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Vehicle-specific application: Designed for the Porsche 911 (997) Carrera 4 (C4), subject to confirmation of exact model-year compatibility.
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Digressive monotube dampers: Provide controlled body motion, responsive chassis support, and consistent damping performance.
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Adjustable damping: Allows suspension behavior 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: Deliver 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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Performance upper mounts: Designed to support chassis control and alignment consistency under demanding driving conditions.
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Hand-built, dyno-matched dampers: Help maintain consistent damping characteristics across the suspension.
Performance Benefits
The Dežru Spec-S coilovers help the Porsche 997 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 uneven pavement.
The 250 lb/in front and 450 lb/in rear spring combination is intended to balance front-end response with the rear support required by the 997's rear-engine layout. Combined with the C4's all-wheel-drive system, a properly tuned suspension can help deliver predictable handling and improved confidence when accelerating out of corners.
The adjustable damping and ride height allow drivers to tailor the suspension setup to their preferences, whether prioritizing comfortable road use or sharper responses during spirited driving. Final performance will depend on the damping settings, 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: 997
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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.
