The BC Racing BR-Series coilover suspension kit offers an excellent combination of adjustability, ride comfort, and performance for both street and track use. The monotube design and large-capacity shock absorber ensure consistent and reliable damping even under heavy stress.
The shock absorber uses a 46 mm piston within a 53 mm body, which increases oil volume and reduces the effect of temperature on damping performance. A larger oil volume helps maintain consistent damping even under prolonged loads.
Technical Specifications:
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Front spring rate: 8 kg/mm
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Rear spring rate: 8 kg/mm
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Front top mounts: Pillowball (uniball)
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Rear top mounts: Rubber
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Vehicle: BMW 3 Series E46
Features:
- 30-way adjustable damping (combined compression and rebound)
- Height adjustment via the lower mount – maintains full shock absorber travel
- Camber-adjustable aluminum pillowball top mounts (front axle)
- Monotube design for efficient heat management
- Nitrogen-pressurized shock absorbers to ensure 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 preload or shock absorber travel.
Damping Adjustment:
30-way adjustment allows for fine-tuning the suspension for various applications. By adjusting the damping of the front and rear axles, driving behavior such as understeer and oversteer, grip, and weight transfer can be influenced.
Corner Weighting:
The adjustable spring perch allows for balancing the car so that the load is evenly distributed to all wheels, improving grip, driving stability, and cornering speed.
Construction and Durability
- Black-chromed steel shock absorbers with excellent corrosion resistance
- Anodized aluminum 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