ER Series Coilover Suspension Kit - E46 Convertible

Product Details

For the E46 Convertible enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ER Series offers uncompromised performance. By moving the secondary damping piston to the external canister, the system maintains its integrity under high-stress, high-temperature conditions. This is especially beneficial for the E46 Convertible, where the added 12kg rear spring rate helps counteract the platform's inherent weight distribution and chassis flex. The system features bearing-mounted spring platforms to eliminate the friction and "spring binding" often felt during tight steering maneuvers. Every ER Series kit is hand-assembled with precision and is fully rebuildable, ensuring it remains a long-term investment in the performance of your BMW.

Key Features:

• Reduced Damping Fade: Strategic fluid placement keeps oil cooler, preserving valving accuracy during extended spirited driving.

• Camber Adjustable Top Mounts: High-quality aluminum plates eliminate the "mushy" feel of factory rubber bushings for direct driver feedback.

• Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme vibration.

• Customization Ready: Fully compatible with Swift Spring upgrades and custom valving tailored to specific tire or aero setups.

• Serviceable Construction: All components are individual and fully replaceable directly through BC Racing North America.

Specifications:

• Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (Excludes M3).

• Spring Rates (Default): Front: 6 kg/mm | Rear: 12 kg/mm.

• Spring Type: High-strength SAE9254 cold-wound steel.

• Construction: 304 Stainless Steel and 6061-T6 Anodized Aluminum.

• Warranty: 2-Year limited manufacturer's warranty.

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