BMW Suspension Parts

BC Racing BR Series Coilover Suspension Kit - W/ Swift Springs - E46 ...

T#:53361585

Part#: I-121-BR-SW

Ships on Oct 6, 2026

$ 1,765.00 USD

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The BC Racing BR Series offers the most affordable entry into coilover suspension without sacrificing performance, comfort, build quality, vehicle height, or handling. This is done by extensively testing each vehicle then refining the coilover characteristics as many times as needed to ensure the most well-balanced and affordable aftermarket suspension conceivable. BC Racing takes great pride in choosing spring rates for our off-the-shelf kits that strike the perfect balance between comfort and performance so you're never stuck with an oversprung suspension like many other brands sell. BC Racing offers one of the widest ranges of damping adjustment with 30-clicks of compression/rebound adjusted simultaneously on the BR Series. With meticulously chosen spring rates, damper valving, and one of the widest adjustment ranges in the industry, you can't go wrong with the BC Racing BR Series Coilover System.

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

For Vehicles With 3-Bolt Top Mounts

T#:51320833

Part#: I-114-DS

Ships in 5 Business Days

$ 1,415.00 USD

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$ 1,415.00 USD

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For the F31 Touring enthusiast who demands superior feedback and body control, the BC Racing DS Series utilizes a proprietary digressive piston design. This architecture provides increased damping force at low piston velocities—perfect for controlling body roll, dive, and squat during quick weight transitions—while transitioning to a linear curve at higher speeds to maintain compliance over bumps. Finished in a premium satin chrome, the DS Series is built for those who prioritize handling precision on technical roads and autocross courses. Like the BR series, it maintains full adjustability but offers a more sophisticated damping profile for the "Ultimate Driver Feel." Key Features: Digressive Piston Design: Enhanced low-speed damping to eliminate "wallow" and improve steering response and turn-in. Satin Chrome Finish: Premium aesthetic and improved corrosion resistance for the shock bodies. 30-Click Adjustment: Unified compression and rebound adjustment for simple, effective trackside tuning. Fixed Spring Seat: Ride height is adjusted via the bottom mount to preserve full stroke and prevent "bottoming out." Camber Plates Included: High-quality front pillow-ball camber plates for aggressive alignment specs. Specifications: Vehicle Fitment: 2012–2019 BMW 3-Series (F31) Touring Wagon (Models with 3-bolt front top mounts). Spring Rates (Default): Front: 6 kg/mm | Rear: 10 kg/mm. Optional Rates: Available with custom Front (up to 18kg) and Rear (up to 18kg) standard or Swift springs. Design: Mono-tube shock with digressive damping curve. Warranty: 2-Year limited manufacturer's warranty.

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BC Racing DS Series Coilover Suspension Kit - Off Center Top Plates -...

T#:49892348

Part#: I-14-DS-OFFC

Ships on Oct 6, 2026

$ 1,565.00 USD

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$ 1,565.00 USD

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BC Racing's new proprietary digressive piston design offers increased damping force at low piston velocities while maintaining a linear damper feel at higher piston velocities. One of the greatest advantages of increased low-speed damping force relates to what the driver feels, e.g., roll, pitch, dive, and quick weight transitions on technical road courses. For The Ultimate In Driver Feel - Choose BC Racing DS Series Coilovers.

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BC Racing HM Series Coilover Suspension Kit - E46 Convertible ...

T#:51320856

Part#: I-90-HM

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$ 2,565.00 USD

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$ 2,565.00 USD

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For the E46 Convertible owner looking to overcome the platform's inherent chassis flex and maximize track performance, the BC Racing HM Series offers a motorsport-first engineering approach. By utilizing an inverted strut layout and a high 12kg rear spring rate, the HM Series provides uncompromised geometry control under heavy cornering loads. The 2-way independent adjustment allows the driver to fine-tune high-speed stability and low-speed turn-in separately, which is critical for balancing a convertible's unique weight distribution. Every HM Series kit is hand-assembled with TIG-welded 304 stainless steel and 6061-T6 aluminum components, ensuring a system that is as durable as it is fast. Key Features: Enhanced Thermal Stability: External canisters move the fluid away from brake heat to maintain valving accuracy. Linear Twin-Piston Design: Provides a large surface area for precise and predictable damping response. Camber Adjustable Top Mounts: Precision-engineered aluminum plates eliminate factory rubber compliance for direct steering feedback. Independent Ride Height: Threaded shock bodies allow for height adjustment without sacrificing damper stroke or spring travel. Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (Excludes M3). Spring Rates (Default): Front: 6 kg/mm | Rear: 12 kg/mm. Piston Design: Linear Twin-Piston. Construction: 304 Stainless Steel and Anodized 6061-T6 Aluminum. Warranty: 2-Year limited manufacturer's warranty.

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

For Vehicles With 3-Bolt Top Mounts

T#:51320841

Part#: I-114-ZX

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$ 2,595.00 USD

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$ 2,595.00 USD

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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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BC Racing ER Series Coilover Suspension Kit - F31 (3-Bolt Top Mounts)...

T#:51320838

Part#: I-114-ER

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$ 1,955.00 USD

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$ 1,955.00 USD

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For the F31 Touring owner looking to dominate the track while maintaining a refined street presence, the BC Racing ER Series offers a "motorsport-first" engineering approach. The inverted-style front struts (on applicable MacPherson designs) and external canisters move the weight of the fluid away from the hubs, reducing unsprung weight and improving the suspension's ability to react to high-speed road imperfections. The system includes bearing-mounted upper spring platforms to eliminate spring "binding" or popping during tight maneuvers. With its massive range of adjustability and robust build quality, the ER Series transforms the F31 wagon into a highly capable, predictable, and remarkably fast track machine. Key Features: Reduced Unsprung Weight: Strategic component placement allows the wheels to track road surfaces more effectively for increased grip. Advanced Damping Control: 30 clicks of compression (on the reservoir) and 30 clicks of rebound (on the shock top) for 900 possible damping combinations. Pillowball Top Mounts: Eliminates the "mushy" feel of factory rubber bushings, providing direct and unmediated feedback to the driver. Concave Lower Locking Ring: BC Racing's patented design prevents the lower mounts from vibrating loose even under extreme track vibration. Serviceable Design: All components are individual and fully replaceable, making the system a long-term investment for the life of the vehicle. Specifications: Vehicle Fitment: 2012–2019 BMW 3-Series (F31) Touring / Wagon (Models with 3-Bolt Top Mounts). Spring Rates (Default): Front: 6 kg/mm | Rear: 10 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel springs. Adjustability: Independent ride height, independent spring preload, and independent 2-way damping. Warranty: 2-Year limited manufacturer's warranty against defects.

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BC Racing BR Series Coilover Suspension Kit - U11 X1 AWD

T#:51356024

Part#: I-126-BR

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$ 1,215.00 USD

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$ 1,215.00 USD

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For the 2022+ BMW X1 owner looking for a robust and durable suspension upgrade, the BC Racing BR Series provides a "no-compromise" approach to build quality. The shock bodies are manufactured from TIG-welded heavy-gauge steel with a black chrome finish for maximum corrosion resistance, while the locking collars and top mounts are crafted from anodized 6061-T6 aluminum. This kit features high-strength SAE9254 cold-wound steel springs, designed to withstand rigorous use without losing their rate. By moving from factory rubber-isolated struts to a precision-valved coilover, the X1 gains sharper turn-in, reduced pitch during braking, and a significantly more connected feel to the road, transforming the SAV's driving dynamics into a more car-like experience. Key Features: Customization Options: Compatible with custom spring rates and Swift Spring upgrades for tailored track or heavy-load setups. In-House Testing: Each kit is extensively track-tested and refined to ensure the best possible balance for the U11 chassis. Bearing-Mounted Spring Platforms: Minimizes "spring binding" or popping noises during low-speed steering maneuvers. Patented Locking Ring: Features a concave lower locking ring that prevents the system from vibrating loose even under track conditions. Corrosion Protection: Finished in black chrome and anodized aluminum for durability in all weather conditions. Specifications: Vehicle Fitment: 2022+ BMW X1 (U11) AWD / xDrive. Spring Rates (Default): Front: 7 kg/mm | Rear: 13 kg/mm. Hardware: Black chromed steel shock bodies with 6061-T6 aluminum components. Build Type: Hand-assembled with 1.5mm wall thickness TIG-welded brackets. Service: Fully rebuildable with all replacement parts readily available.

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ZX Series Coilover Suspension Kit - E93

T#:50066868

Part#: I-153-ZX

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$ 2,595.00 USD

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$ 2,595.00 USD

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Take command of your chassis with BC Racing coilovers, featuring 6kg/mm front and 10kg/mm rear spring rates for a perfect balance of ride comfort and performance-oriented handling. Built around BC Racing’s monotube damper design, this coilover system provides sharper damping response, reduced body roll, and consistent feedback compared to factory suspension. The spring combination offers a compliant front end with a slightly firmer rear, promoting predictable handling and stable, confidence-inspiring performance for street and spirited driving. Independent ride height adjustment lets you dial in stance without compromising shock travel or ride quality. Matched springs and dampers work together to keep the car composed whether you’re commuting, carving back roads, or pushing hard on spirited drives. Why it stands out: Monotube dampers for consistent, reliable performance 6kg/mm front, 10kg/mm rear spring rates for balanced handling Fully independent ride height adjustment for precise setup Tuned for everyday driving with spirited performance capability Durable construction built for long-term use

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BC Racing ZR Series Coilover Suspension Kit - E46 Convertible ...

T#:51320857

Part#: I-90-ZR

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$ 2,865.00 USD

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$ 2,865.00 USD

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Designed for racers ranging from novice to pro, the BC Racing ZR Series addresses the unique weight distribution and chassis requirements of the E46 Convertible. The inverted front struts utilize a massive 42mm piston shaft, providing a rigid backbone that prevents geometry deflection under heavy braking and high-G cornering. By separating low-speed and high-speed compression, drivers can stiffen low-speed damping to eliminate body roll and pitch during turn-in while keeping high-speed damping compliant enough to absorb track curbing without upsetting the chassis. Every ZR kit is hand-assembled with TIG-welded steel and anodized 6061-T6 aluminum, providing a professional-grade motorsport component that is fully rebuildable and customizable. Key Features: Enhanced Low-Speed Damping: Specifically tuned to stabilize the E46’s heavier convertible chassis during quick weight transitions. Thermal Management: Remote-mounted external reservoirs move fluid away from hot brake components to ensure consistent lap times. Camber Adjustable Top Mounts: High-quality aluminum plates eliminate factory rubber "mush," providing direct, unmediated steering feedback. Bearing-Mounted Spring Platforms: Minimizes friction between the spring and perch to eliminate "spring binding" during tight steering. Industrial Corrosion Protection: Black chrome-plated steel shock bodies and electrophoretic disposition on steel mounts ensure a long service life. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (All models except M3). Spring Rates (Standard): Front: 6 kg/mm | Rear: 10 kg/mm (Swift Springs). Piston Design: Linear Twin-Piston (Standard on 3-way kits). Weight: Approx. 23 kg (Full Kit). Warranty: 2-Year limited manufacturer's warranty.

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BC Racing DS Series Coilover Suspension Kit - E46 Convertible ...

T#:51320846

Part#: I-90-DS

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$ 1,415.00 USD

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$ 1,415.00 USD

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The BC Racing DS Series for the E46 Convertible is built using motorsport-grade materials designed to withstand the rigors of spirited driving and technical road courses. Because the E46 platform benefits greatly from increased front camber, this kit comes standard with front pillowball camber plates. These plates replace the compliant factory rubber mounts, providing unmediated feedback to the driver and allowing for aggressive alignment settings to maximize tire contact patches. Every DS Series kit is fully rebuildable and customizable, with the option to upgrade to Swift Springs for even more consistent spring rates and reduced weight. Whether you're carving canyons or attending a weekend track day, the DS Series provides the stability and feedback needed to push the E46 chassis to its limits. Key Features: Front Camber Plates: Precision-engineered aluminum plates for surgical alignment and increased turn-in bite. Satin Chrome Finished Shock Body: A highly durable coating that resists the elements while providing a high-end look. Linear Spring Piston: While the valving is digressive, the springs remain linear to provide a predictable and consistent feel. Fully Rebuildable: Every part, from the seals to the valving, is serviceable and replaceable. Custom Spring Rate Compatibility: Can be ordered with custom valving paired specifically to your requested spring rates. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (All models except M3). Spring Rates (Default): Front: 6 kg/mm | Rear: 8 kg/mm. Optional Rates: Custom rates available (e.g., 8kg/10kg) for more track-oriented setups. Piston Diameter: 46mm. Adjustability: Ride height, spring preload, and 30-way damping.

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RM Series Coilover Suspension Kit - E46 Convertible

T#:51320850

Part#: I-90-RM

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$ 1,515.00 USD

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$ 1,515.00 USD

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For the E46 Convertible enthusiast who demands uncompromised feedback, the BC Racing RM Series offers a professional-grade solution. By moving the oil reservoir away from the wheel hub and brake components, the RM Series manages heat more effectively, preventing "damper fade" during long track sessions. The inclusion of front pillowball camber plates eliminates the compliant factory rubber bushings, providing direct and unmediated steering feel. Because convertibles often suffer from chassis flex, the RM Series' ability to maintain a flat cornering attitude through its stiff 12kg rear spring rate and robust inverted front struts makes it a transformative upgrade for the E46 platform. Key Features: Enhanced Thermal Management: Inverted layout moves fluid away from brake heat to maintain consistent damping performance. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for aggressive alignment specs to maximize front-end grip. Patented Concave Locking Ring: Unique design ensures that once ride height is set, the lower mounts remain locked securely. TIG-Welded Durability: High-strength steel shock bodies with a black chrome finish for maximum corrosion resistance. Fully Rebuildable: Every component is individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (Excludes M3). Spring Rates (Default): Front: 6 kg/mm | Rear: 12 kg/mm. Damping Curve: Linear. Construction: Heavy-duty steel and 6061-T6 aluminum. Warranty: 2-Year limited warranty against manufacturer's defects.

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ER Series Coilover Suspension Kit - E46 Convertible

T#:51320855

Part#: I-90-ER

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$ 1,955.00 USD

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$ 1,955.00 USD

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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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BC Racing RM Series Coilover Suspension Kit - E46 M3 Convertible ...

T#:51355989

Part#: I-121-RM

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$ 1,515.00 USD

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$ 1,515.00 USD

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For the E46 M3 Convertible owner who demands uncompromised feedback during spirited driving or track sessions, the BC Racing RM Series offers a professional-grade motorsport approach. By moving the fluid reservoir away from the wheel hub and brake components, the RM Series manages heat more effectively, preventing damper fade during prolonged high-speed sessions. The inclusion of front pillowball camber plates replaces compliant factory rubber bushings, providing direct and unmediated steering feel. Because convertibles often require higher roll stiffness to compensate for chassis flex, the RM Series' default 12kg rear spring rate provides the stability needed to keep the E46 M3 planted and responsive through tight technical sections. Key Features: Reduced Damper Fade: Inverted layout keeps oil temperature more stable by increasing distance from hot brake components. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for aggressive alignment specs to maximize front-end grip. Patented Concave Locking Ring: Unique design ensures that once ride height is set, the lower mounts remain locked securely against vibration. Linear Piston Architecture: Provides a predictable and consistent damping feel for better driver confidence at the limit. Fully Rebuildable: Every component is individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Optional Upgrades: Compatible with custom spring rates and Swift Springs (+2kg/-2kg range on standard valving). Finish: Black chrome-plated steel bodies for maximum corrosion resistance. Warranty: 2-Year limited warranty against manufacturer's defects.

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BC Racing DS Series Coilover Suspension Kit - G30 AWD

T#:51355985

Part#: I-131-DS

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$ 1,415.00 USD

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$ 1,415.00 USD

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For the BMW G30 owner looking to eliminate the "wallow" of factory suspension, the BC Racing DS Series offers a professional-grade motorsport approach. Built from TIG-welded 304 stainless steel and heavy-duty aluminum, this system is designed to withstand the rigors of high-intensity driving. The DS Series includes high-strength SAE9254 cold-wound steel springs, which have been tested through over 500,000 cycles with less than 5% deformation. By moving the secondary damping piston to the digressive valving architecture, the system provides a sharper turn-in and more direct steering feedback. Every DS Series kit is hand-assembled and fully rebuildable, ensuring it remains a long-term performance investment for your BMW. Key Features: Enhanced Chassis Poise: Digressive damping curve specifically combats the weight of the G30 chassis during spirited driving. Pillowball Top Mounts: High-quality aluminum alloy mounts provide direct 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. Bearing-Mounted Spring Platforms: Minimizes "spring binding" or popping during low-speed steering maneuvers. Customization Ready: Fully compatible with custom spring rates and Swift Spring upgrades for tailored track setups. Specifications: Vehicle Fitment: 2017–2023 BMW 5-Series (G30) Sedan AWD / xDrive. Spring Rates (Default): Front: 9 kg/mm | Rear: 4.2 kg/mm. Adjustability: Independent ride height, independent spring preload, and 30-way damping. Maintenance: Fully rebuildable with all replacement parts readily available. Warranty: 1-Year limited manufacturer's warranty.

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ZX Series Coilover Suspension Kit - E46 Convertible

T#:51320859

Part#: I-90-ZX

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$ 2,565.00 USD

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$ 2,565.00 USD

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For the E46 Convertible enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ZX Series offers an unparalleled engineering approach. By moving the compression valving to the external canisters, the system maintains its integrity under high-stress, high-temperature conditions, effectively eliminating "damper fade." For the E46 Convertible—which lacks the structural rigidity of its coupe counterparts—the ZX Series' advanced damping provides the stability needed to maintain a flat cornering attitude. The system features bearing-mounted spring platforms to eliminate "spring binding" or popping during tight maneuvers. Fully rebuildable and customizable, the ZX Series is a long-term investment in the competitive potential of your BMW. Key Features: Enhanced Thermal Management: External canisters keep fluid away from brake heat, maintaining valving accuracy lap after lap. Camber Adjustable Top Mounts: High-quality aluminum plates eliminate factory rubber "mush," providing direct, unmediated steering feedback. Independent Ride Height: Threaded bottom mounts allow for ride height changes without sacrificing suspension travel or preload. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme track vibration. Custom Valving Available: Each kit can be custom-valved to match specific driver preferences or extreme aero/tire setups. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (Excludes M3 models). Spring Rates (Default): Front: 6 kg/mm | Rear: 10 kg/mm (Swift Springs standard). Spring Type: Genuine Swift Springs for reduced unsprung weight. Piston Design: Linear Twin-Piston with remote canister valving. Warranty: 2-Year limited manufacturer's warranty.

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BR Series Coilover Suspension Kit

For GT RWD model 5-series

T#:50731692

Part#: I-110-BR

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$ 1,215.00 USD

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$ 1,215.00 USD

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If you’re looking for a suspension package that can handle daily driving, spirited back roads, and regular track time without compromise, the BC Racing BR Series has earned its reputation for a reason. It delivers broad adjustability, dependable construction, and chassis-specific tuning at a price point that continues to make sense for enthusiasts. Designed to integrate with factory mounting locations, the BR Series installs cleanly using OE-style brackets and hardware. Each damper is hand assembled and dyno tested, then paired based on matched compression and rebound values to ensure consistent performance from side to side. Spring rates and internal valving are selected following extensive R&D and long-term evaluation to balance ride quality with capability. Damping changes are made through a single adjuster offering 30 positions of simultaneous compression and rebound, giving you a wide operating window from comfortable street manners to firm, controlled response during aggressive driving. This configuration includes a 10K front spring rate with an S-barrel front spring where packaging requires it, paired with a linear rear arrangement for predictable, repeatable behavior. Construction highlights 6061-T6 aluminum upper mounts on applicable positions Rubber isolation mounts where reduced NVH is preferred Aluminum or robotically welded steel lower brackets Powder-coated components for corrosion resistance SAE9254 steel springs with protective zinc and powder coating Tuning & fitment 30-way damping adjustment Valving matched to spring design and rate Direct compatibility with OE mounting points and components

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ZX Series Coilover Suspension Kit - F44

T#:50066866

Part#: I-155-ZX

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$ 2,595.00 USD

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$ 2,595.00 USD

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Enhance your suspension setup with BC Racing coilovers, configured with 5kg/mm front and 6kg/mm rear spring rates to deliver a composed balance between ride quality and performance-focused handling. Utilizing BC Racing’s monotube damper design, this coilover system improves damping response, minimizes body roll, and provides consistent feedback compared to factory suspension components. The spring rate combination favors a compliant front with a slightly softer rear, resulting in predictable chassis behavior and stable, confidence-inspiring handling for street-oriented performance driving. Ride height adjustment is independent of shock travel, allowing precise stance tuning without compromising suspension geometry or ride comfort. Springs and dampers are properly matched to maintain control and stability whether commuting daily or driving aggressively on back roads. Key Features: Monotube dampers for consistent damping performance 5kg/mm front and 6kg/mm rear spring rates optimized for street handling Independent ride height adjustment Tuned for daily driving with spirited performance capability Durable construction for long-term reliability

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BC Racing DS Series Coilover Suspension Kit - E46 M3 Convertible ...

T#:51355987

Part#: I-121-DS

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$ 1,415.00 USD

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$ 1,415.00 USD

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The BC Racing DS Series for the E46 M3 Convertible is built using motorsport-grade materials designed to withstand the rigors of spirited driving and technical road courses. Because the E46 M3 platform benefits greatly from increased front camber, this kit comes standard with front pillowball camber plates. These plates replace the compliant factory rubber mounts, providing unmediated feedback to the driver and allowing for aggressive alignment settings to maximize tire contact patches. Every DS Series kit is hand-assembled and fully rebuildable, with the option to upgrade to Swift Springs for even more consistent spring rates and reduced weight. Whether you're carving canyons or attending a weekend track day, the DS Series provides the stability and feedback needed to push the E46 M3 chassis to its limits. Key Features: Front Camber Plates: Precision-engineered aluminum alloy plates for surgical alignment and increased turn-in bite. Patented Locking Ring: Features a concave lower locking ring that prevents the system from vibrating loose even under track conditions. Bearing-Mounted Spring Platforms: Minimizes "spring binding" or popping during low-speed steering maneuvers. Fully Rebuildable: Every component, from the seals to the valving, is individual and replaceable for long-term serviceability. Customization Ready: Fully compatible with custom spring rates and Swift Spring upgrades for tailored track setups. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Default): Front: 7 kg/mm | Rear: 12 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel. Adjustability: Independent ride height, independent spring preload, and 30-way damping. Warranty: 2-Year limited manufacturer's warranty.

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

For Vehicles With 3-Bolt Top Mounts

T#:51320834

Part#: I-114-RM

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$ 1,515.00 USD

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$ 1,515.00 USD

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For the enthusiast who uses their F31 Touring as both a daily driver and a weekend track tool, the BC Racing RM Series provides unparalleled driver feedback. The inclusion of front pillowball camber plates as standard allows for aggressive alignment settings that sharpen turn-in and eliminate the "mushy" feel associated with OEM rubber mounts. By moving the oil reservoir away from the hub, the fluid stays cooler during spirited sessions, preventing the "damper fade" that often plagues standard suspension setups after consistent hard use. With the RM Series, the BMW F31 gains a level of poise and responsiveness typically reserved for dedicated M-cars. Key Features: Camber Adjustable Top Mounts: Pillowball front top mounts allow for precise camber adjustment and direct steering feedback. Reduced Damper Fade: Inverted layout keeps oil temperature more stable by increasing distance from hot brake components. Bearing-Mounted Spring Platforms: Minimizes friction between the spring and the perch to eliminate "spring binding" and popping. Patented Concave Locking Ring: Unique design ensures that once height is set, the lower mounts remain locked securely against vibration. Serviceable Design: Fully rebuildable with all replacement parts available directly from BC Racing. Specifications: Vehicle Fitment: 2012–2019 BMW 3-Series (F31) Touring / Wagon (3-Bolt Front Top Mounts). Spring Rates (Default): Front: 6 kg/mm | Rear: 10 kg/mm. Optional Rates: Custom springs (BC or Swift) available from 4kg to 20kg+ to suit specific builds. Construction: TIG-welded heavy-duty steel and anodized aluminum components. Warranty: 2-Year limited manufacturer's warranty.

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BC Racing HM Series Coilover Suspension Kit - E46 M3 Convertible ...

T#:51355994

Part#: I-121-HM

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$ 2,565.00 USD

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$ 2,565.00 USD

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For the E46 M3 Convertible owner who demands uncompromised geometry control, the BC Racing HM Series offers a motorsport-first engineering solution. By utilizing an inverted strut layout with a much larger internal piston shaft, the HM Series excels in maintaining wheel alignment during extreme lateral cornering—a critical factor for the MacPherson strut-equipped M3. The addition of external reservoirs ensures the damping fluid remains cool, preserving valving accuracy lap after lap. Standard front pillowball camber plates eliminate factory rubber "mush," providing direct and unmediated steering feedback. Because convertibles often require higher roll stiffness to compensate for chassis flex, the HM Series’ 12kg rear spring rate provides the stability needed to keep the car planted and responsive. Key Features: Enhanced Side-Load Resistance: The inverted design handles high lateral loads longer than traditional upright dampers without fatigue. Reduced Damper Fade: External canisters move fluid away from brake heat to maintain consistent lap times. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for surgical alignment and increased turn-in bite. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked even under track conditions. Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Standard): Front: 8 kg/mm | Rear: 12 kg/mm (Swift Springs). Hardware: Black chrome-plated steel shock bodies and 6061-T6 aluminum components. Adjustment Type: Independent ride height, spring preload, and 2-way damping. Warranty: 1-Year limited manufacturer's warranty.

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BC Racing ZX Series Coilover Suspension Kit - E46 M3 Convertible ...

T#:51356016

Part#: I-121-ZX

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$ 2,595.00 USD

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$ 2,595.00 USD

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For the E46 M3 Convertible enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ZX Series offers an unparalleled engineering approach. By moving the compression valving to the external canisters, the system maintains its integrity under high-stress, high-temperature conditions, effectively eliminating "damper fade." For the E46 M3 platform—especially the convertible which requires higher roll stiffness to compensate for chassis flex—the ZX Series' 12kg rear spring rate and advanced damping provide the stability needed to maintain a flat cornering attitude. The system features standard front pillowball camber plates to eliminate factory rubber "mush," providing direct and unmediated steering feedback to the driver. Key Features: Enhanced Thermal Management: External canisters keep fluid away from brake heat to maintain valving accuracy lap after lap. Camber Adjustable Top Mounts: High-quality aluminum alloy plates allow for aggressive track alignments to maximize the tire contact patch. Pillowball Rear Mounts: Replaces rubber bushings with solid spherical bearings (on applicable kits) for increased response and precision. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme track vibration. Fully Rebuildable: Every component is individual and replaceable, making this a long-term investment in the car's competitive potential. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm (Swift Springs standard). Piston Design: Linear Twin-Piston with remote canister valving. Adjustment Range: 3-Way Independent (Rebound / Low-Speed Compression / High-Speed Compression). Warranty: 1-Year limited manufacturer's warranty.

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BC Racing DS Series Coilover Suspension Kit - E89 Z4

T#:51356035

Part#: I-111-DS

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$ 1,415.00 USD

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$ 1,415.00 USD

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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.

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BR Series Coilover Suspension Kit - G16 8-Series GC

For Gran Coupe AWD models only

T#:50731709

Part#: I-123-BR

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$ 1,215.00 USD

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$ 1,215.00 USD

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Step up to a real coilover system without blowing the budget with the BC Racing BR Series. Developed through extensive chassis testing and ongoing refinement, this kit is built to deliver sharper handling, everyday comfort, and the durability enthusiasts expect when the miles—and the pace—start adding up. BC avoids the trap of flashy, overly stiff spring specs and instead selects rates that preserve compliance while significantly improving body control. Matched damper valving ties the package together, producing a ride that feels planted, predictable, and easy to live with day after day. The mono-tube design resists heat fade during aggressive use, and the linear piston profile ensures smooth, consistent feedback as cornering loads increase. Because ride height is adjusted independently from preload, you can dial in the stance you want without compromising travel or upsetting the car’s balance. With 30 clicks of simultaneous compression and rebound adjustment, the BR Series covers a wide spectrum of driving styles—from daily commuting to serious weekend work. Key Features Highly customizable configuration 10KG front / 5KG rear spring rates Mono-tube shock construction Linear piston and damping characteristics Independent ride height adjustment 30-position compression and rebound tuning Front camber plates standard on applicable kits Rear camber solutions for select vehicles Custom spring rates and Swift compatibility Optional custom or matched valving Fully rebuildable design Protected by a 2-year manufacturer warranty

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BC Racing ER Series Coilover Suspension Kit - E46 M3 Convertible ...

T#:51355992

Part#: I-121-ER

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$ 1,955.00 USD

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$ 1,955.00 USD

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For the E46 M3 enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ER Series offers a "motorsport-first" engineering approach. By moving the secondary damping piston to the external canister, the system maintains its integrity under high-stress conditions. This is especially beneficial for the M3 Convertible, where the high 12kg rear spring rate helps counteract the platform's inherent weight and chassis flex, providing a flat and predictable cornering attitude. The system includes front pillowball camber plates as standard, eliminating the compliant factory rubber bushings to provide direct, unmediated steering feedback and allowing for aggressive track-ready alignment settings. Key Features: Reduced Damping Fade: External canisters keep fluid cooler by increasing the distance from hot brake components. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for surgical alignment and increased turn-in bite. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme vibration. Linear Piston Architecture: Provides a predictable and consistent damping feel for better driver confidence at the limit. Serviceable Construction: All components are individual and fully replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel. Construction: Black chrome-plated steel bodies for maximum corrosion resistance and anodized 6061-T6 aluminum. Warranty: 1-Year limited manufacturer's warranty.

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BC Racing BR Series Coilover Suspension Kit - U11 X1 FWD

T#:51356033

Part#: I-119-RM

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$ 1,515.00 USD

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$ 1,515.00 USD

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For the serious enthusiast, the BC Racing DS Series for the U11 BMW X1 FWD 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 even under heavy, long-term use. The digressive damping architecture is specifically tuned to stabilize the X1's high center of gravity, providing a "planted" car-like feel that inspires confidence on technical roads. 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 steering maneuvers. Key Features: Enhanced Body Control: Targeted damping profile specifically reduces the "wallow" associated with factory SUV suspension. Camber Adjustable Top Mounts: Precision-engineered aluminum alloy plates provide unmediated feedback and allow for aggressive alignment specs. Patented Locking Ring: Features a concave lower locking ring that prevents the system from vibrating loose under intense conditions. Thermal Management: Mono-tube architecture and high-quality fluid ensure the valving remains consistent during aggressive driving sessions. Serviceable Construction: All components are individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2022+ BMW X1 (U11) Front-Wheel Drive (FWD). Spring Rates (Default): Front: 5.5 kg/mm | Rear: 6.5 kg/mm. Damping Architecture: 1-Way Adjustable (30 Clicks). Build Material: TIG-welded heavy-gauge steel and CNC-machined aluminum. Warranty: 1-Year limited manufacturer's warranty.

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BC Racing ZR Series Coilover Suspension Kit - E46 M3 Convertible ...

T#:51356002

Part#: I-121-ZR

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$ 2,865.00 USD

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$ 2,865.00 USD

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For the professional-level racer or the extreme enthusiast, the BC Racing ZR Series addresses the unique geometric and thermal requirements of the E46 M3 platform. By utilizing inverted front struts with a massive 42mm piston shaft, the ZR Series provides extreme structural rigidity, preventing geometry deflection under heavy braking and cornering loads. The 3-way adjustment allows the driver to "dial in" the car for specific obstacles; for instance, softening high-speed compression to soak up aggressive curbing while keeping low-speed compression firm for immediate turn-in response. Combined with standard pillowball top mounts, this system eliminates the "mushy" feel of factory rubber, providing direct, unmediated feedback to the driver. Key Features: Reduced Damper Fade: Remote external canisters move fluid away from hot brake components to ensure consistent lap times. Camber Adjustable Top Mounts: High-quality aluminum plates allow for aggressive track alignments to maximize the tire contact patch. Pillowball Rear Mounts: Replaces rubber bushings with solid spherical bearings for increased response and precision. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme track vibration. Fully Rebuildable: Every component is individual and replaceable, making this a long-term investment in the car's competitive potential Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Construction: TIG-welded steel and CNC-machined aluminum. Adjustment Range: 3-Way Independent (Rebound / Low-Speed Compression / High-Speed Compression). Warranty: 1-Year manufacturer’s warranty against defects.

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BR Series Coilover Suspension Kit - E91 Touring AWD

T#:50731697

Part#: I-148-BR

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$ 1,215.00 USD

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$ 1,215.00 USD

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Affordable, adaptable, and built with the enthusiast in mind, the BC Racing BR Series is a proven gateway into true coilover performance. Every application benefits from extensive chassis testing and continual refinement, resulting in a setup that delivers control, confidence, and everyday usability right out of the box. Instead of relying on overly stiff spring packages, BC focuses on rates that improve handling while keeping the car livable. Matched with carefully developed damper valving, the ride feels composed and predictable rather than harsh. A mono-tube design helps control heat and maintain consistent damping under demanding conditions. The linear piston profile provides transparent feedback as grip builds, and independent ride height adjustment allows changes to stance without sacrificing travel or upsetting balance. With 30 clicks of simultaneous compression and rebound adjustment, you get a huge range of tuning—from comfortable daily duty to focused performance driving in just seconds. Key Features Highly configurable setup 6.5KG front / 10KG rear spring rates Mono-tube damper construction Linear piston and damping curve Independent ride height adjustment 30-position compression/rebound tuning Front camber plates on applicable kits Rear camber solutions for select vehicles Custom spring rates and Swift compatibility Optional custom valving Fully rebuildable Supported by a 2-year manufacturer warranty

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BR Series Coilover Suspension Kit

T#:50731694

Part#: I-122-BR

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$ 1,215.00 USD

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$ 1,215.00 USD

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If you’re stepping into coilovers for the first time and refuse to trade comfort for capability, the BC Racing BR Series is one of the most well-rounded systems you can bolt on. Extensive chassis-specific R&D and real-world validation mean the setup arrives ready to perform — comfortable enough for daily duty, composed when the pace increases. BC selects spring rates to maintain ride quality while still delivering the body control enthusiasts expect. Combine that with matched damper valving and a wide adjustment range, and you get a package that adapts easily to street driving, back road runs, or time spent at the circuit. A mono-tube damper layout helps maintain consistency as temperatures rise, and the linear piston profile keeps feedback predictable near the limit. Because ride height is adjusted separately from preload, you can fine-tune stance without reducing usable suspension travel. Thirty clicks of combined compression and rebound adjustment give you meaningful flexibility — compliant for commuting, disciplined for competition. Highlights Highly configurable system 10KG front / 5KG rear spring rates Mono-tube shock construction Linear piston and damping behavior Independent ride height adjustment 30-step compression/rebound tuning Front camber plates included where applicable Rear camber options available for select vehicles Alternate spring rates and Swift upgrades available Optional custom valving Fully rebuildable design Covered by a 2-year manufacturer warranty

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MMX Underbody Chassis Brace - F80, F82, F83, F87

T#:55713525

Part#: MMR13-1000

In Stock

$ 295.00 USD

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$ 295.00 USD

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The MMX Performance Underbody Chassis Brace is engineered specifically for the F8x platform to eliminate the unwanted flex that plagues the factory mid-section. On the track or your favorite backroad, flex alters your alignment mid-corner, reducing tire contact patch.

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ASP Series Height Adjustable Spring & Camber Plate Kit - BMW F80 M3, ...

T#:52621845

Part#: 131BW001C2

Ships in 5 Business Days

$ 1,115.00 USD

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$ 1,115.00 USD

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BC Racing’s new adjustable spring perch (ASP) is an excellent solution for customers seeking a lowered stance, but still require the OEM electronic damping system to remain functional. Compared with conventional lowering springs, the BC Racing ASP offers ride height adjustability that seamlessly allows users more flexibility to tailor their chassis to the needs of modern suspension, performance, and style.

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MMX Performance G8X / F8X OEM Rear Toe/Traction Arm Bearing Set ...

T#:56363322

Part#: MMR55-1650

Ships in 3 Business Days

$ 269.99 USD

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Qty

$ 269.99 USD

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The MMX Performance Rear Toe/Traction Arm Bearing Set deletes that deflection, locking down your G8X or F8X chassis for pure, predictable cornering.

ASP Series Height Adjustable Spring Kit - BMW 18-22 G15 M850i ...

T#:52657004

Part#: 131BW004N1

Ships in 5 Business Days

$ 815.00 USD

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$ 815.00 USD

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BC Racing’s new adjustable spring perch (ASP) is an excellent solution for customers seeking a lowered stance, but still require the OEM electronic damping system to remain functional. Compared with conventional lowering springs, the BC Racing ASP offers ride height adjustability that seamlessly allows users more flexibility to tailor their chassis to the needs of modern suspension, performance, and style.

T#:51356045

Part#: I-03-ZX

Back Ordered

$ 2,595.00 USD

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$ 2,595.00 USD

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For the E90/E92 enthusiast looking to bridge the gap between a high-end street car and a professional race machine, the BC Racing ZX Series offers an unparalleled level of feedback. By moving the compression valving to external canisters, the system effectively manages the heat generated during aggressive driving, maintaining valving accuracy and preventing "damper fade." The 3-way adjustment allows the driver to "dial in" the car for specific obstacles—for instance, softening high-speed compression to soak up aggressive track curbing while keeping low-speed compression firm for sharp turn-in response. Combined with standard front pillowball camber plates, this system eliminates factory rubber "mush," providing direct, unmediated steering feedback and allowing for aggressive alignment specs. Key Features: Triple-Valved Control: Precision adjustment of 30 clicks Rebound, 20 clicks Low-Speed Compression, and 12 clicks High-Speed Compression. Thermal Management: External canisters keep fluid away from hot brake components to ensure consistent lap times and drift consistency. Dual Piston Design: Combines the best characteristics of the DS and ER series for a broad range of damping authority. Motorsport-Grade Components: TIG-welded heavy-gauge steel shock bodies with black chrome finish and 6061-T6 aluminum components. Serviceable Construction: All components are individual and fully replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2006–2011 BMW 3 Series E90 (Sedan) / E92 (Coupe) - Non-M Models. Spring Rates (Default): Front: 5.5 kg/mm | Rear: 9 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel (Swift Spring upgrade available). Adjustability: Independent ride height, spring preload, and 3-way damping. Rebuildable: Fully rebuildable to original manufacturer specifications.

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