Description
The Dežru Spec-S Coilover System is designed for the 2009–2013 Subaru Forester, offering a performance-oriented suspension upgrade intended to improve chassis control, stability, and steering response while retaining everyday drivability.
The Forester is an all-wheel-drive SUV built for daily commuting, all-weather driving, and practical versatility. Its factory suspension prioritizes comfort, which can allow noticeable body movement during cornering, braking, and rapid directional changes. The Dežru Spec-S aims to refine these characteristics through digressive monotube damping and application-specific spring rates, creating a more composed and predictable driving experience.
Featuring digressive piston valving, the Spec-S is designed to provide strong low-speed damping support during braking, steering inputs, and body-roll events while remaining responsive to typical road imperfections. Its intended ride-frequency range of approximately 1.6–1.9 Hz reflects a street-focused approach to suspension tuning.
The fixed-length damper design is intended to maintain appropriate damper geometry and usable suspension travel within the approved setup range. Combined with adjustable damping and linear springs, the Spec-S offers a configurable suspension solution for Forester owners seeking improved handling without an unnecessarily harsh ride.
Key Features
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Digressive Monotube Dampers: Designed to improve body control, handling response, and damping consistency.
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Fixed-Length Damper Design: Intended to maintain appropriate damper geometry and usable suspension travel within the specified setup range.
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Adjustable Damping: Allows drivers to fine-tune suspension response for everyday comfort or a more controlled driving feel.
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Application-Specific Spring Rates: 400 lb/in front and 450 lb/in rear, selected for the specified Forester application.
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Linear HyperCoil Springs: Designed to provide predictable spring response throughout suspension travel.
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OEM-Style Upper Mounts: Intended to support vehicle-specific installation while helping minimize unwanted noise and vibration.
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Hand-Built, Dyno-Matched Pairs: Designed to provide consistent damping characteristics between paired dampers.
Performance and Ride Characteristics
The Dežru Spec-S is designed to give the Subaru Forester a more planted and controlled feel during everyday driving. Its combination of digressive damping and application-specific spring rates aims to reduce excessive body movement while maintaining a practical balance of comfort and suspension support.
During cornering, the system is intended to help manage body roll and improve chassis response. Under braking and acceleration, its damping characteristics aim to provide more controlled suspension movement. During highway driving and lane changes, the Spec-S is designed to deliver a more composed and predictable feel.
The specified 400 lb/in front and 450 lb/in rear spring rates provide the foundation for the system's intended balance of support and compliance. Actual ride comfort and handling depend on damper calibration, suspension geometry, alignment, tires, vehicle loading, and road conditions.
Designed primarily for street use, the Spec-S is intended for drivers who want sharper handling and improved chassis control while retaining the Forester's everyday practicality.
Spring Rate Selection: 400 lb/in Front and 450 lb/in Rear
The Dežru Spec-S uses 400 lb/in front and 450 lb/in rear spring rates for the specified application.
The front spring rate is intended to provide additional support during braking and steering inputs, while the rear rate is selected to help balance chassis response and suspension support. However, spring rates alone do not determine wheel rate or load-carrying performance. Suspension geometry, motion ratios, damper tuning, and vehicle weight distribution also influence the final result.
This spring-rate combination is designed to help:
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Reduce excessive body roll and overall chassis movement.
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Improve stability during braking and directional transitions.
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Support a balanced front-to-rear suspension response.
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Maintain a street-oriented balance between control and comfort.
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Deliver a more predictable driving feel on everyday roads.
The final handling characteristics will depend on the complete suspension setup and the vehicle's operating conditions.
Adjustable Damping and Suspension Design
The Spec-S features adjustable damping, allowing drivers to tailor suspension response to their preferences and road conditions. Softer settings may be preferable for everyday comfort, while firmer settings may provide a more controlled response during spirited street driving.
Its digressive piston valving is designed to provide strong damping support during slower suspension movements associated with body roll, pitch, and weight transfer while allowing the suspension to respond to road irregularities.
The fixed-length damper design is intended to maintain appropriate damper operation within the specified setup range. Confirm the manufacturer's approved ride-height settings and installation requirements for the exact Forester application before ordering.
Who Is the Dežru Spec-S For?
The Dežru Spec-S Coilover System is suited to:
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Subaru Forester owners seeking improved stability and chassis control.
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Daily drivers who want more responsive handling without an aggressively stiff setup.
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Drivers who regularly encounter winding roads, highway transitions, and uneven pavement.
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Enthusiasts who want adjustable damping and application-specific spring rates.
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Owners seeking a more composed driving experience while retaining everyday SUV practicality.
Product Summary
The Dežru Spec-S Coilovers for the 2009–2013 Subaru Forester combine digressive monotube dampers, adjustable damping, fixed-length damper bodies, and 400 lb/in front and 450 lb/in rear linear springs. With an intended ride-frequency range of approximately 1.6–1.9 Hz, the system is designed to improve chassis control and driving composure while maintaining a street-focused character.
Vehicle Fitment
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Make: Subaru
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Model: Forester
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Model Years: 2009–2013
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Generation: Third-generation Forester
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Chassis Code: SH
Disclaimer: This product is built to order. Please allow approximately 3–4 weeks for production before shipment.
