I-111-DS - BC Racing DS Series Coilover Suspension Kit - E89 Z4
BC Racing DS Series Coilover Suspension Kit - E89 Z4
For the serious BMW enthusiast, the BC Racing DS Series for the E89 Z4 offers a "no-compromise" approach to suspension geometry and thermal stability. By utilizing high-strength SAE9254 cold-wound steel springs, this system provides a highly consistent spring rate that resists deformation over long-term use. The digressive damping architecture is specifically tuned to stabilize the Z4’s low-slung chassis, providing sharp turn-in and unmediated steering feedback. Every DS Series kit is hand-assembled and fully rebuildable, featuring bearing-mounted spring platforms to eliminate "spring binding" or popping noises during low-speed maneuvers.
Key Features:
Enhanced Body Control: Targeted damping profile specifically reduces the "wallow" and float associated with factory suspension.
Pillowball Top Mounts: High-quality aluminum alloy mounts provide direct driver feedback and eliminate factory rubber compliance.
Patented Locking Ring: Features a concave lower locking ring that prevents the system from vibrating loose even under track conditions.
Customization Ready: Fully compatible with custom spring rates and Swift Spring upgrades for tailored track setups.
Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system.
Specifications:
Vehicle Fitment: 2009–2016 BMW Z4 (E89).
Spring Rates (Default): Front: 5.5 kg/mm | Rear: 9 kg/mm.
Hardware: Black chromed steel shock bodies with anodized 6061-T6 aluminum components.
Damping Range: 30-Way Simultaneous (Compression/Rebound).
Build Type: Hand-assembled with 1.5mm wall thickness TIG-welded brackets.
BC Racing DS Series Coilover Suspension Kit - E89 Z4
$1415.00
Product Details
For the serious BMW enthusiast, the BC Racing DS Series for the E89 Z4 offers a "no-compromise" approach to suspension geometry and thermal stability. By utilizing high-strength SAE9254 cold-wound steel springs, this system provides a highly consistent spring rate that resists deformation over long-term use. The digressive damping architecture is specifically tuned to stabilize the Z4’s low-slung chassis, providing sharp turn-in and unmediated steering feedback. Every DS Series kit is hand-assembled and fully rebuildable, featuring bearing-mounted spring platforms to eliminate "spring binding" or popping noises during low-speed maneuvers.
Key Features:
Enhanced Body Control: Targeted damping profile specifically reduces the "wallow" and float associated with factory suspension.
Pillowball Top Mounts: High-quality aluminum alloy mounts provide direct driver feedback and eliminate factory rubber compliance.
Patented Locking Ring: Features a concave lower locking ring that prevents the system from vibrating loose even under track conditions.
Customization Ready: Fully compatible with custom spring rates and Swift Spring upgrades for tailored track setups.
Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system.
Specifications:
Vehicle Fitment: 2009–2016 BMW Z4 (E89).
Spring Rates (Default): Front: 5.5 kg/mm | Rear: 9 kg/mm.
Hardware: Black chromed steel shock bodies with anodized 6061-T6 aluminum components.
Build Type: Hand-assembled with 1.5mm wall thickness TIG-welded brackets.
Prop 65 Warning
Product Q&A
Lifetime Replacement
This product is not eligible for Lifetime Replacement
Fits These Cars
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Special Fitment Notes
BMW
U11
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Use vehicle selector to confirm fitment
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Prop 65 Warning
