BC Racing HM Series Coilover System (2008 - 2014 Subaru Impreza STI Hatchback - GRB) - F-10-HM
Advanced Inverted Coilover Performance for the GRB STI
Push your 2008 - 2014 Subaru Impreza STI Hatchback (GRB) to its full potential with the BC Racing HM Series Coilover System - a suspension package engineered by merging the strengths of the RM and ER lines. The HM Series utilizes a fully inverted mono-tube damper for superior rigidity and reduced unsprung weight, while integrating independent 30-way compression and rebound adjustment borrowed from the ER Series. With external reservoirs, steel-braided reservoir lines, and Swift Springs included as standard, the HM Series offers exceptional heat management, consistency, and precision - ideal for aggressive street builds and heavily tracked GRB STI models.
Performance Highlights
- Inverted mono-tube damper construction increases strength and reduces strut flex under load.
- Independent 30-way compression and rebound adjustment delivers professional-level tuning flexibility.
- External reservoirs boost oil capacity and improve thermal dissipation for consistent damping.
- Steel-braided reservoir lines provide reliability and consistent pressure under hard driving.
- Swift Springs come standard for more responsive, stable, and fatigue-resistant performance.
- Independent ride height adjustment maintains full damper travel across various lowering setups.
- Front and rear camber plates included where applicable for fine-tuned alignment control.
- Pillowball mounts included on non-camber-plate kits for improved steering feel.
- Custom valving options available to match specific spring rate needs.
- Fully rebuildable with a 2-year manufacturer warranty for long-term performance.
Quick Specs
- Brand: BC Racing
- Series: HM Series
- Part Number: F-10-HM
- Vehicle Fitment: 2008 - 2014 Subaru Impreza STI Hatchback (GRB)
- Damper Design: Fully inverted mono-tube with external reservoirs
- Compression Adjustment: 30-way via external reservoirs
- Rebound Adjustment: 30-way via bottom of damper
- Height Adjustment: Independent of spring preload
- Default Spring Rates: Front 8kg/mm | Rear 8kg/mm
- Springs Included: Swift Springs (standard)
- Camber Plates: Front and rear included where applicable
- Mount Type: Pillowball mounts when camber plates do not apply
- Warranty: 2 Years (Manufacturer Defect)
- Rebuildable: Yes
Why Choose BC Racing HM Series Coilovers?
The HM Series is engineered specifically for McPherson-strut high-performance Subarus like the GRB STI. By combining inverted damper strength, independent damping control, and Swift Springs, this setup excels under repeated track abuse while still offering adjustability for street comfort. Whether you're chasing faster lap times or refining your GRB's street handling, the HM Series provides elite stability, sharper feedback, and superior heat resistance.
FAQs
How does the HM Series differ from the RM and ER Series?
The HM Series blends the inverted damper design of the RM Series with the independent compression and rebound adjustability of the ER Series - giving you the best of both worlds.
Does this kit really include Swift Springs?
Yes. Swift Springs are included as standard on all HM Series kits for improved linearity and reduced spring fatigue.
Is this setup good for daily street driving?
Absolutely. Although track-focused, the HM Series has a large adjustment range that allows for a compliant street-friendly ride when softened.
Can BC Racing valve these coilovers for custom spring rates?
Yes. BC Racing offers custom valving to match your preferred spring rates or driving style.
Fitment
- 2008 Subaru Impreza STI Hatchback (GRB)
- 2009 Subaru Impreza STI Hatchback (GRB)
- 2010 Subaru Impreza STI Hatchback (GRB)
- 2011 Subaru Impreza STI Hatchback (GRB)
- 2012 Subaru Impreza STI Hatchback (GRB)
- 2013 Subaru Impreza STI Hatchback (GRB)
- 2014 Subaru Impreza STI Hatchback (GRB)
Why Buy from Beefcake Racing?
Beefcake Racing is an authorized BC Racing dealer offering knowledgeable support, competitive pricing, and fast shipping. Whether your STI is a track monster or a tuned daily, we'll help you choose the perfect HM configuration for your goals. Reach out anytime at sales@beefcakeracing.com or call 1-855-827-7223. Beefcake Racing - Performance Starts Here.
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