ZX Series Coilover Suspension Kit - F31 (3-Bolt Top Mounts)

Product Details

For the F31 Touring owner who demands a professional-grade suspension setup, the BC Racing ZX Series delivers unparalleled driver feedback and thermal stability. By moving the compression valving to the external canisters, the system can better manage the extreme temperatures generated during track use, ensuring that damping rates remain consistent from the first lap to the last. The 3-way adjustment allows for specialized tuning; for instance, softening high-speed compression to handle curbing while keeping low-speed compression firm for sharp turn-in and minimal body roll. This level of control, paired with a significant reduction in unsprung weight via strategic component design, transforms the F31 into a remarkably poised and highly responsive racing machine.

Key Features:

• Triple-Valved Control: 30 clicks of Rebound, 15 clicks of High-Speed Compression, and 15 clicks of Low-Speed Compression.

• Thermal Management: External reservoirs keep fluid cooler, extending the life of the oil and maintaining valving consistency.

• Reduced Unsprung Weight: Lightweight aluminum components where possible to improve wheel tracking over high-speed imperfections.

• Custom Valving Available: Valving can be paired specifically for custom spring rates or Swift Spring upgrades.

• Fully Rebuildable: Every component is individual and replaceable, making this a long-term investment for a competitive chassis.

Specifications:

• Vehicle Fitment: 2012–2019 BMW 3-Series (F31) Touring / Wagon (3-Bolt Top Mount models).

• Spring Rates (Default): Front: 6 kg/mm | Rear: 10 kg/mm.

• Spring Options: Customizable from 6kg to 30kg+ to suit specific aero or tire requirements.

• Damping Architecture: Mono-tube with external canisters.

• Adjustment Type: Independent ride height and 3-way damping.

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