The BC Racing BR-Series coilover suspension kit offers a wide range of adjustment, high performance, and reliable operation for both street and track use. The monotube design combined with a large shock absorber ensures consistent damping even under heavy stress.
The shock absorber uses a 46 mm piston in a 53 mm body, which increases oil volume and reduces the effect of temperature variations on damping. This improves driving stability and performance, especially in demanding driving conditions.
Technical specifications:
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Spring rate front: 6 kg/mm
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Spring rate rear: 12 kg/mm
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Top mount front: Pillowball (uniball)
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Top mount rear: Rubber
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Vehicle: BMW 3-series E90 Sedan
Features:
- 30-way adjustable damping (combined compression and rebound)
- Height adjustment via the lower mount – maintains full shock absorber travel
- Camber-adjustable aluminium pillowball top mounts (front axle)
- Monotube design for efficient heat management
- Nitrogen-pressurised shock absorbers for consistent damping
- Adjustable spring perch and corner weighting possible
- Bearing-mounted upper spring perch reduces friction and improves steering feel
- Dust boots to protect shock absorber seals
- Patented locking ring prevents height adjustment from loosening
Performance and adjustability
Height adjustment:
Ride height is adjusted from the bottom of the shock absorber, allowing for a wide range of adjustment without affecting spring pre-load or the shock absorber's operating range.
Damping adjustment:
30-way adjustment allows for fine-tuning of the suspension for various applications. By changing the damping on the front and rear axles, driving characteristics such as understeer, oversteer, and grip distribution can be influenced.
Corner weighting:
The adjustable spring perch allows the car to be balanced so that the load is optimally distributed to all wheels, improving grip and handling.
Construction and durability
- Black chrome-plated steel shock absorbers with excellent corrosion resistance
- Anodised aluminium components (top mounts, locking rings)
- Powder-coated and electrophoretically treated steel parts
- Springs made from high-strength steel (SAE9254)
- Tested for over 500,000 compression cycles
Package includes:
- Complete coilover suspension kit (front and rear axle)
- Camber-adjustable pillowball top mounts (front)
- Rubber top mounts (rear)
- Ready-to-install shock absorbers and springs