Description
BMW M3/M4 (5-BOLT) RWD F80/F82 (14-20) BC Racing HM Series Coilovers | 6/12kg.mm
BC Racing HM Series Coilovers for BMW M3/M4 (5-BOLT) RWD F80/F82 (14-20) deliver precision suspension tuning with a 6/12kg.mm spring rate, engineered to enhance both road handling and track performance on your M-sport machine. These premium coilovers offer fully adjustable damping and ride height control, allowing you to fine-tune your BMW's chassis dynamics to suit your driving style and conditions. Built with BC Racing's proven HM Series construction, these coilovers provide the responsive control that demands from high-performance driving.
BC Racing HM Series Coilovers
BC Racing's HM Coilover system offers the same great benefits of the RM Series with the addition of 2-way damping adjustment. Each HM system features inverted monotube dampers with independently adjustable compression and rebound. The inverted damper design moves vital damper fluid away from detrimental heat sources to avoid overheating and damper fade under extreme track use, while also decreasing unsprung weight by moving the majority of the coilover mass up to the chassis — improving ride quality, wheel control and steering feel. With the combination of inverted monotube dampers and external reservoirs, the HM Series is suited to the most demanding users on track.
Key Features
- Digressive piston and damping curve
- 30 levels of separate rebound and compression adjustment
- Inverted damper design (depending on model)
- Dual piston design (1 reservoir, 1 in shock)
- Teflon coated steel braided lines for external reservoir on inverted dampers
- Pillowball top mounts
- Tapered bottom mount locking collar to prevent it from working loose
- Custom spring rates available
- All spare parts available with low lead times
- Dust boot to protect damper seals
- 1 year manufacturer warranty
Inverted Monotube with External Reservoir
The inverted design positions the damper body at the top of the assembly, reducing unsprung weight and moving damper fluid away from brake-generated heat at the wheel end. The external reservoir adds further oil capacity via Teflon-coated steel braided lines — combining both advantages for effective thermal management in demanding track conditions.
Kit Specifications
- Fitment: BMW M3/M4 (5-BOLT) RWD F80/F82 (14-20)
- Spring Rate: 6/12kg.mm
- 30 Levels Separate Rebound and Compression Adjustment
- Monotube Damper Design
- Full Ride Height Adjustment (via Bottom Mount)
- Adjustable Spring Platforms for Corner Weighting
- Tapered Bottom Mount Locking Collar
- Custom Spring Rates Available
- All Spare Parts Available
- 1 Year Manufacturer Warranty
Fitment Data
| Make | Bmw |
| Model | M4 |
| Chassis | BMW M3/M4 (5-BOLT) RWD F80/F82 (14-20) |
| Series | HM |
| Spring Rate | 6/12kg.mm |
| Part Number | I-68-HM |