BC Racing ER Series Coilover System (2005 - 2007 Subaru Impreza STI - GDE / GDF) - F-03-ER
Elite Suspension Control for the 2005 - 2007 Subaru Impreza STI
Dial in your Subaru Impreza STI (GDE / GDF) with the BC Racing ER Series Coilover System - a premium, motorsport-focused suspension engineered for drivers who demand total control. The ER Series features independent 30-way compression and rebound adjustment paired with remote reservoirs that increase oil capacity and boost heat dissipation for consistent performance during hard driving. Developed through rigorous real-world track testing, the ER Series provides unmatched flexibility for enthusiasts seeking precise tuning and race-ready handling characteristics.
Performance Highlights
- Independent compression and rebound adjustment for ultra-fine suspension tuning.
- Remote reservoirs increase oil volume to reduce heat and maintain stable damping.
- Mono-tube, linear twin-piston design ensures predictable, consistent damper response.
- Independent height adjustment allows you to change ride height without affecting preload.
- Front and rear camber plates standard on applicable kits for maximum alignment precision.
- Pillowball mounts included on applications without camber plates for sharper steering feel.
- Custom valving and spring rate options available for your exact driving style.
- Swift Spring upgrades offered for most setups to improve linearity and durability.
- Fully rebuildable with a 2-year manufacturer warranty.
Quick Specs
- Brand: BC Racing
- Series: ER Series
- Part Number: F-03-ER
- Vehicle Fitment: 2005 - 2007 Subaru Impreza STI (GDE / GDF)
- Damper Design: Mono-tube twin-piston with external reservoirs
- Compression Adjustment: 30-way via external reservoirs
- Rebound Adjustment: 30-way via damper top
- Height Adjustment: Independent of spring preload
- Default Spring Rates: Front 6kg/mm | Rear 4kg/mm
- Camber Plates: Front and rear included where applicable
- Mount Type: Pillowball mounts standard when camber plates are not used
- Warranty: 2 Years (Manufacturer Defect)
- Rebuildable: Yes
Why Choose BC Racing ER Series Coilovers?
The ER Series is engineered for drivers who want complete authority over their STI's suspension dynamics. With fully independent compression and rebound adjustments, expanded oil volume, and track-validated performance, the ER Series offers exceptional damping control, fade resistance, and responsiveness. Whether you're dialing in a dedicated track setup or refining a street-driven build, the ER Series provides uncompromising capability and precision.
FAQs
What makes the ER Series different from DS or BR coilovers?
The ER Series features independent compression and rebound adjustment and remote reservoirs, offering more tuning flexibility and better heat management than the BR and DS Series.
Are the ER Series good for street use?
Yes. While designed for performance and track use, the wide adjustment range allows the ER Series to be softened for comfortable street driving.
Do these include camber plates and pillowball mounts?
Yes. Front and rear camber plates are included where applicable, and pillowball mounts come standard on setups without camber plates.
Can I customize spring rates and valving?
Absolutely. BC Racing supports custom spring rates, custom valving, and Swift Spring upgrades on most applications.
Fitment
- 2005 Subaru Impreza STI (GDE / GDF)
- 2006 Subaru Impreza STI (GDE / GDF)
- 2007 Subaru Impreza STI (GDE / GDF)
Why Buy from Beefcake Racing?
Beefcake Racing is an authorized BC Racing dealer known for expert suspension guidance, competitive pricing, and fast shipping. Whether your STI build is track-focused or street-refined, our team will help you choose the perfect setup. Contact us at sales@beefcakeracing.com or call 1-855-827-7223. Beefcake Racing - Performance Starts Here.
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