The BC Racing BR-Series coilover kit offers a wide adjustment range, consistent damping, and reliable performance for both street and track use. The monotube design and large-capacity shock absorber ensure consistent operation 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 fluctuations on damping. The larger oil volume helps maintain consistent damping even under prolonged loads.
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: Not included (OEM top mount must be used)
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Top mount rear: Rubber
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Vehicle: BMW 3-series F34 Gran Turismo
Features:
- 30-level damping adjustment (combined compression and rebound)
- Height adjustment via the lower mount – maintains full shock absorber travel
- Monotube construction 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
- Protective boots to shield shock absorber seals
- Patented locking ring prevents height adjustment from loosening
- Some features depend on the model
Performance and adjustability
Height adjustment:
Ride height is adjusted from the lower mount of the shock absorber, allowing for a wide adjustment range without affecting spring preload or the shock absorber's operating range.
Damping adjustment:
30-level adjustment allows for fine-tuning of the suspension for different applications. Adjusting the damping of the front and rear axles can affect driving behavior, such as understeer and oversteer, grip, and weight transfer.
Corner weighting:
The adjustable spring perch allows the car to be balanced so that the load is optimally distributed to all wheels, improving grip, driving stability, and cornering speed.
Construction and durability
- Black chrome-plated steel shock absorbers with excellent corrosion resistance
- Anodized aluminum components (locking rings, etc.)
- Powder-coated and electrophoretically treated steel parts
- Springs made of high-strength steel (SAE9254)
- Tested for over 500,000 compression cycles
Package includes:
- Complete coilover kit (front and rear axle)
- Rubber top mounts (rear)
- Ready-to-install shock absorbers and springs