A more livable STI without losing its edge.
The Spec-A is built for STI owners who want a lowered, controlled car that doesn’t punish them on every drive. It smooths out harshness while keeping the precision and confidence the STI is known for.
Dežru Spec-A Coilovers – Subaru STI (2008–2014)
The Dežru Spec-A is engineered specifically for the 2008–2014 STI, focusing on delivering a more refined driving experience without stripping away the car’s inherent capability.
Many coilover setups for the STI lean heavily toward stiffness, which can make the car feel harsh, busy, and fatiguing on real-world roads. The Spec-A takes a different approach, using properly balanced spring rates and damping to maintain control while significantly improving ride quality.
With a lowering range of 0.5" to 3" below OEM ride height, the Spec-A provides the aggressive stance most STI owners want while preserving suspension function and usability.
Key Features
- Comfort-focused monotube dampers tuned for real-world driving.
- Rebound adjustable (20 clicks) for dialing in ride quality and responsiveness.
- ~392 lb/in front and ~448 lb/in rear spring rates, selected to support the STI chassis while maintaining comfort.
- Dual height adjustment for independent ride height and preload tuning.
- Radial bearing front mounts for smooth steering feel.
- OEM hybrid upper mounts to reduce NVH.
- CNC machined high-flow piston for consistent damping behavior.
- Electro-plated steel shock bodies for durability.
- Stainless steel shim stacks for long-term reliability.
- Pre-configured brackets for ABS and sensor integration.
- Fully rebuildable with individual parts available.
Performance Character
The Spec-A refines the STI’s driving experience by reducing harshness and unnecessary stiffness while maintaining strong chassis control. The car feels more composed over rough roads and less fatiguing during daily use, without becoming soft or disconnected.
The slightly higher rear spring rate helps stabilize the chassis during acceleration and cornering, while the front maintains enough support for confident turn-in and braking. This results in a predictable, balanced feel that works well in both daily driving and spirited conditions.
Around town, the ride is noticeably smoother and more forgiving. On the highway, the car feels planted and stable. When pushed on backroads, it maintains composure without the harshness typically associated with stiff coilover setups.
While the Spec-A is designed primarily for comfort, it remains capable of spirited driving and occasional autocross, making it a versatile setup for street-focused STI builds.
Who This Is For
- Drivers who want a more comfortable, livable STI
- Those tired of overly stiff, harsh coilovers
- Daily-driven cars with occasional spirited use
- Owners who want control without sacrificing ride quality
If your goal is an STI that still feels sharp but no longer punishes you on imperfect roads, the Spec-A strikes that balance.
