BC Racing HM Series Coilover System (2015 - 2021 Subaru Impreza STI / WRX - VAB / VAF / VAG) - F-25-HM
Inverted, Track-Grade Coilovers for the 2015 - 2021 WRX & STI
Dial in serious suspension performance for your 2015 - 2021 Subaru WRX or STI (VAB / VAF / VAG) with the BC Racing HM Series Coilover System. By combining the strengths of the RM and ER Series, the HM Series delivers fully inverted mono-tube dampers for maximum rigidity and reduced unsprung weight, plus independent 30-way compression and rebound adjustment for precise tuning. Built specifically for McPherson-strut Subarus that see heavy track days or spirited mountain runs, the HM Series integrates external reservoirs, steel-braided reservoir lines, and Swift Springs included standard - creating a highly capable, heat-stable, and tunable suspension system.
Performance Highlights
- Fully inverted mono-tube damper construction increases chassis rigidity and reduces flex under load.
- Independent 30-way compression and rebound adjustability delivers race-quality tuning.
- External reservoirs allow expanded oil volume and superior thermal dissipation.
- Steel-braided reservoir lines ensure durability and consistent fluid transfer.
- Swift Springs included for improved linearity, reduced sag, and better long-term stability.
- Independent ride height adjustment maintains proper damper stroke at any lowered height.
- Front and rear camber plates included on applicable kits for precise alignment correction.
- Pillowball mounts standard where camber plates do not apply for increased steering feedback.
- Custom valving available for fine-tuned spring rate and driving style optimization.
- Fully rebuildable and protected by a 2-year manufacturer warranty.
Quick Specs
- Brand: BC Racing
- Series: HM Series
- Part Number: F-25-HM
- Vehicle Fitment: 2015 - 2021 Subaru WRX / STI (VAB / VAF / VAG)
- Damper Design: Fully inverted mono-tube with external reservoirs
- Compression Adjustment: 30-way via external reservoir
- Rebound Adjustment: 30-way via bottom of damper
- Height Adjustment: Independent of spring preload
- Default Spring Rates: Front 7kg/mm | Rear 6kg/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 specifically engineered for performance-oriented Subaru drivers who want a suspension setup that can handle repeated high-speed abuse without fading. With inverted dampers, Swift Springs, and independent damping adjustment, this system delivers elite chassis feedback, precision alignment capability, and exceptional heat stability. Whether you're carving canyon roads, daily commuting, or laying down laps, the HM Series offers the tuning range and durability needed for the VAB/VAF/VAG chassis.
FAQs
How does the HM Series differ from the ER Series?
The HM Series uses inverted mono-tube dampers for greater rigidity and less unsprung weight, while still offering the independent compression and rebound tuning found in the ER Series.
Does the HM Series include Swift Springs?
Yes. Swift Springs come standard with every HM Series kit, offering improved response and longevity.
Is the HM Series suitable for daily driving?
Absolutely. The HM Series can be set soft for daily comfort or adjusted for aggressive track use thanks to its wide damping range.
Can I order custom spring rates or custom valving?
Yes. BC Racing supports custom spring rates and custom valving to meet your specific driving style or performance goals.
Fitment
- 2015 Subaru WRX / STI (VAB / VAF / VAG)
- 2016 Subaru WRX / STI (VAB / VAF / VAG)
- 2017 Subaru WRX / STI (VAB / VAF / VAG)
- 2018 Subaru WRX / STI (VAB / VAF / VAG)
- 2019 Subaru WRX / STI (VAB / VAF / VAG)
- 2020 Subaru WRX / STI (VAB / VAF / VAG)
- 2021 Subaru WRX / STI (VAB / VAF / VAG)
Why Buy from Beefcake Racing?
Beefcake Racing is an authorized BC Racing dealer offering expert suspension guidance, competitive pricing, and fast shipping. Whether your WRX or STI build is aimed at daily performance, canyon carving, or full track duty, our team will help you select the perfect HM Series configuration. Reach us anytime at sales@beefcakeracing.com or call 1-855-827-7223. Beefcake Racing - Performance Starts Here.
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