Mazda MX-5 BC Racing ER Series Coilovers

This series inherits the premium quality and unique features of the BR Series, enhanced with external reservoirs and independent compression and rebound damping adjustments.

Key Features

• Linear Valving: Provides consistent and predictable damping.
• 30 Clicks of Compression Adjustment: Adjusted via external reservoirs.
• 30 Clicks of Rebound Adjustment: Controlled from the top of the damper.
• Independent Ride Height Adjustment: Separate from spring preload.
• Monotube Damper Design: Ensures better heat dissipation and consistent performance.
• Bearing Mounted Upper Spring Platform: Reduces friction and improves efficiency.
• Tapered Bottom Mount Locking Collar: Prevents the collar from working loose.
• Pillowball Top Mounts: Enhances response and handling.
• Custom Spring Rates Available: To meet specific performance needs.
• Full Range of Spare Parts: Available with short lead times.
• Dust Boot: Protects the damper seal.

External Reservoir

The inclusion of external reservoirs increases the oil capacity of the damper unit, reducing peak oil temperatures and minimizing damping rate variations due to changes in oil viscosity. This results in improved handling and performance both on the road and track.

Separate Compression and Rebound Damping Adjustment

The ER Series allows for precise tuning of the vehicle’s suspension. Independent adjustments for compression and rebound help in fine-tuning the car’s behavior during various driving scenarios:

• Compression Damping: Controls how the car transfers weight to the front tires during braking.
• Rebound Damping: Manages the suspension response as the car comes off the brakes, maintaining front-end grip and improving corner exit speeds.

Corner Weight Adjustment

Adjustable lower spring platforms allow for corner weighting, ensuring balanced loading on each tire. This optimizes overall grip, maximizes cornering speed, and reduces lap times.

Ride Height Adjustment

The ride height is adjustable via the coilover bottom mount, maintaining full damper travel regardless of the height setting. This design ensures optimal performance across a range of ride heights.

Damping Adjustment

With 30-way damping adjustment, the ER Series coilovers allow for fine-tuning of both rebound and compression. This feature is crucial for adapting the vehicle to various driving conditions, from drag racing to drifting.

Pillowball (Rose Joint) Upper Mount

Made from anodized aluminum alloy, the pillowball upper mounts eliminate the flex associated with standard rubber mounts, improving response and handling. Japanese-manufactured pillowballs ensure durability and performance.

Corrosion Protection

BC Racing dampers are black chromed for durability, with anodized aluminum components and electrophoretically coated steel lower mounts. Regular salt spray tests ensure high anti-corrosive standards.

High Quality Coil Springs

Manufactured from SAE9254 high-strength cold-wound steel, these springs undergo over 500,000 compression cycles with less than 5% deformation, ensuring longevity and performance.

Patented Concave Lower Locking Collar

The innovative lower locking collar design prevents the common issue of collars working loose, ensuring consistent ride height and handling.

High Quality Oil

Using high-quality oil maintains consistent viscosity and damping performance under extreme conditions, extending the damper’s operating life.

Nitrogen Pressurized Dampers

Pressurized with nitrogen, these dampers reduce oil aeration and cavitation, maintaining consistent damping and adding an effective spring rate element to the damper unit.

Bearing Mounted Upper Spring Platform

This design reduces friction between the spring and seats, preventing spring binding and maintaining consistent spring rates, enhancing the efficiency of the steering system and overall handling.

The BC Racing ER Series Coilovers are an excellent choice for enthusiasts seeking precision, adjustability, and superior performance for both street and track applications.

Fits all Mazda MX-5 models:
1989 – 1997 NA Mk1
1998 – 2005 NB Mk2
2006 – 2015 NC Mk3
2016 – 2024 ND Mk4

Shipping world-wide.