Description
Take your Subaru WRX STI’s suspension performance to the next level with the Dežru Spec-S Coilover System, engineered for drivers who want sharper chassis response, improved body control, and greater confidence on the street and at the track.
Designed for the 2008–2014 Subaru Impreza WRX STI GR/GV platform, the Dežru Spec-S combines digressive inverted monotube dampers, adjustable damping, and matched 450 lb/in front and rear spring rates to deliver a performance-focused suspension setup for daily driving, spirited back-road runs, autocross, and occasional HPDE events.
The Spec-S uses digressive damper valving designed to provide strong control during initial suspension movements, helping manage body motion during braking, cornering, and quick directional changes. Its damping characteristics also aim to maintain compliance over uneven pavement, making it a versatile option for STI owners who want more controlled handling without committing to an exclusively track-focused setup.
With a target ride frequency of approximately 1.9–2.2 Hz, this suspension package is designed to balance responsiveness and everyday usability. Linear HyperCoil springs work with the damper system to provide consistent spring behavior, while OEM-style upper mounts offer a factory-style mounting approach.
The fixed-length inverted damper bodies support an adjustable lowered ride height of approximately 25–50 mm, allowing you to refine the STI’s stance while maintaining a suspension design focused on usable travel and predictable response. A professional installation and alignment are recommended to help achieve the intended results.
Key Features
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Digressive inverted monotube dampers: Designed to improve chassis control and manage body movement during braking, cornering, and transitions.
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Adjustable damping: Allows suspension response to be fine-tuned within the system’s adjustment range for different driving conditions.
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450 lb/in front and rear spring rates: Matched nominal spring rates provide a performance-oriented foundation for suspension tuning.
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Linear HyperCoil springs: Deliver consistent spring behavior throughout suspension travel.
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Fixed-length inverted damper bodies: Designed to support suspension performance across the intended lowering range.
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Adjustable ride height: Offers approximately 25–50 mm of lowering for a tailored stance and setup.
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OEM-style upper mounts: Retain a factory-style mounting approach and are intended to help limit additional noise and vibration associated with some aftermarket mounts.
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Hand-built, dyno-matched pairs: Designed to provide consistent damping characteristics between paired dampers.
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Street and occasional track versatility: Suitable for drivers who want a more controlled suspension setup for everyday use and spirited driving.
Performance Character
More Controlled Cornering
The Spec-S is designed to help reduce excessive body movement during cornering and directional transitions. This can give the STI a more composed feel through bends, during braking, and when changing direction quickly.
Sharper Driver Feedback
The combination of digressive damping and 450 lb/in front and rear springs aims to deliver a more responsive connection between driver inputs and chassis behavior. Adjustable damping allows drivers to refine the setup to suit their preferences and road conditions.
Performance Without an Exclusively Track-Focused Setup
With a target ride frequency of approximately 1.9–2.2 Hz, the Spec-S aims to balance performance-oriented control with practical street use. Actual ride comfort and handling balance will depend on alignment, tires, suspension geometry, damper settings, and vehicle configuration.
Adjustable Lowered Stance
The approximately 25–50 mm lowering range lets you tailor the STI’s ride height to your preferred appearance and driving setup. After installation or ride-height changes, a professional alignment is recommended.
Why Choose 450 lb/in Front and Rear Spring Rates for the 2008–2014 WRX STI?
The 2008–2014 Subaru WRX STI is known for its capable all-wheel-drive platform and performance potential. For owners looking to develop a more controlled, responsive suspension setup, the Dežru Spec-S combines 450 lb/in front and rear springs with digressive damper valving to help manage chassis movement during spirited driving.
Equal nominal spring rates provide a straightforward starting point for suspension tuning. However, spring rates alone do not determine whether a vehicle will understeer or oversteer. The STI’s overall handling balance also depends on suspension geometry, motion ratios, anti-roll bars, alignment, tires, damper calibration, and vehicle setup.
At the front, the spring and damper combination is designed to provide support during braking and corner entry. At the rear, the matching nominal spring rate contributes to the overall chassis-control strategy during acceleration and cornering transitions.
Combined with adjustable damping, the Spec-S gives drivers the opportunity to refine suspension response for daily driving, winding roads, and occasional performance events.
The intended benefits include:
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Improved control of body roll and suspension movement.
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More responsive directional transitions.
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A performance-oriented suspension feel with adjustable damping.
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A lowered stance with approximately 25–50 mm of adjustment.
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Versatility for everyday driving and spirited use.
The result is a suspension package designed to make your STI feel more composed and responsive while preserving its versatility as a road-going performance car.
Who Is the Dežru Spec-S For?
The Dežru Spec-S is suited to WRX STI owners who want to:
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Upgrade from the factory suspension to an adjustable coilover system.
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Improve chassis control during spirited street driving.
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Reduce excessive body movement through corners and transitions.
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Adjust ride height for a more aggressive stance.
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Fine-tune damping for different driving conditions.
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Enjoy occasional autocross or HPDE events while retaining everyday usability.
Vehicle Fitment
Make: Subaru
Model: Impreza WRX STI
Model Years: 2008–2014
Chassis: GR/GV, depending on body style
Fitment note: Confirm the exact kit application for the vehicle’s model year, body style, and trim before ordering. Do not assume compatibility with the non-STI WRX without verification.
Disclaimer: This product is built to order. Please allow approximately 3–4 weeks for production before shipment.
