Description
BMW Z4 E85 (02-08) BC Racing DS Series Coilovers | 5/8kg.mm
The BC Racing DS Series Coilovers for BMW Z4 E85 (02-08) deliver precision suspension tuning with a 5/8kg.mm spring rate, engineered for drivers seeking responsive handling and adjustable ride height. These track-focused coilovers combine advanced damping technology with proven reliability, making them an ideal choice for both road and circuit use on your Z4 E85. BC Racing's DS Series represents a premium suspension solution that maximises performance potential across the BMW Z4 E85 (02-08) platform.
BC Racing DS Series Coilovers
The BC Racing DS Coilover system is built with digressive valving, offering the same great benefits of the BR Series and is considered a perfect choice for those looking for track-biased coilovers. The digressive piston design produces a non-linear damping curve — allowing higher low-speed damping to control body roll through cornering, acceleration and braking, while providing reduced high-speed damping to allow the wheel to travel when running kerbs, preventing the impact from transmitting fully into the shell and retaining car balance.
Key Features
- Digressive piston and damping curve
- Satin chrome finished shock body
- 30 clicks of simultaneous rebound and compression adjustment
- Ride height adjustment separate to spring preload
- Monotube damper design
- Pillowball top mounts (depending on model)
- Bearing mounted upper spring platform
- Camber adjustable top mounts (depending on model)
- Tapered bottom mount locking collar to prevent collar working loose
- Custom spring rates available
- All spare parts available with low lead times
- Dust boot to protect damper seals
- 1 year manufacturer warranty
Digressive Piston Valving
Unlike a conventional linear piston, the DS digressive design increases damping force at low piston velocities — the range associated with body roll, pitch and dive during driven inputs — while reducing damping force at high piston velocities, such as when a wheel travels over a kerb. This keeps the car stable during cornering loads while allowing impacts to be absorbed without upsetting the chassis balance.
Kit Specifications
- Fitment: BMW Z4 E85 (02-08)
- Spring Rate: 5/8kg.mm
- 30-Way Combined Damping 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 | Z4 |
| Chassis | E85 (02-08) |
| Series | DS |
| Spring Rate | 5/8kg.mm |
| Part Number | I-12-DS-DA |