BC Racing ER Series 2-Way Coilover Kit – Mazda MX-5 Mk3 NC 2006–2015 • N-11-ER-ER

BC Racing N-11-ER-ER ER Series 2-Way Coilover Kit

BC Racing ER Series coilover kit for Mazda MX-5 Mk3 / Mk3.5 / Mk3.75 NC / NCEC 2006–2015 applications listed in the compatibility table.

The ER Series is BC Racing's two-way adjustable external-reservoir suspension range, designed for drivers looking for significantly greater control over suspension setup for demanding fast-road, track-day and motorsport use.

Compression and rebound damping can be adjusted independently, allowing each part of the damper response to be tuned separately. Compression provides 30 adjustment positions through the external reservoirs, while rebound provides a further 30 adjustment positions at the dampers.

The external reservoirs increase the available damper oil capacity and help manage oil temperature during sustained demanding use. Combined with monotube damper construction and ride-height adjustment independent from spring preload, the ER Series provides extensive scope for tailoring the suspension to the vehicle and its intended use.

This N-11-ER-ER configuration uses 10 kg/mm front and 7 kg/mm rear springs.

• Product type: Complete 2-way adjustable coilover suspension kit
• Series: ER Series
• Primary use: Fast road, track day and motorsport
• Location / system: Front and rear suspension
• Brand: BC Racing
• Product reference / part number: N-11-ER-ER
• Vehicle application: Mazda MX-5 / Miata NC / NCEC 2006–2015
• Engine applications: 1.8 and 2.0 petrol
• Damper design: Monotube
• External reservoirs: Yes
• Front spring rate: 10 kg/mm
• Rear spring rate: 7 kg/mm
• Damping adjustment: Independent 2-way compression and rebound adjustment
• Compression adjustment: 30 positions via the external reservoirs
• Rebound adjustment: 30 positions at the dampers
• Ride height adjustment: Adjustable independently from spring preload
• Upper mounting arrangement: Application-specific BC Racing upper mounting configuration
• Quantity supplied: Complete four-corner coilover suspension kit

Fitment advice: Designed for Mazda MX-5 Mk3, Mk3.5 and Mk3.75 NC / NCEC applications from 2006–2015, including the applicable 1.8 and 2.0 petrol models listed in the compatibility table. For imported, modified or previously repaired cars, matching the vehicle generation, chassis code, suspension layout and kit reference is recommended before ordering.

Other items to consider: When fitting or setting up this product, you may also want to consider purchasing replacement suspension fasteners, anti-roll bar links, suspension bushes and any worn suspension arms or ball joints. For a track-focused installation, professional four-wheel alignment and corner-weighting should also be considered once the final ride height has been established.

Useful tools / consumables: Suitable vehicle lifting equipment and axle stands, socket and spanner set, torque wrench, penetrating fluid, anti-seize compound and the appropriate BC Racing coilover adjustment tools. Professional wheel-alignment and suspension setup equipment will be required for final geometry and damper setup.

Difficulty guide: DIY Difficulty: Advanced. Installation involves replacement of the complete front and rear suspension assemblies together with installation and positioning of the external reservoir components. Ride height, geometry, compression and rebound damping must then be set correctly. Professional installation and setup are recommended for a suspension system of this type.

Why BC Racing? BC Racing ER Series suspension provides independently adjustable compression and rebound damping together with external reservoirs, giving considerably greater suspension tuning control than a conventional single-adjustable coilover. The combination of monotube dampers, increased oil capacity, independent ride-height adjustment and separate 30-position compression and rebound adjustment makes the ER Series particularly well suited to serious fast-road, track-day and motorsport applications.

What’s in the box: Complete four-corner BC Racing ER Series coilover suspension kit with front and rear dampers, 10 kg/mm front springs, 7 kg/mm rear springs, external reservoir assemblies, applicable upper mounting components and associated adjustment and installation components supplied with the N-11-ER-ER kit.

Installation / setup notes: The external reservoirs must be positioned and secured correctly during installation. Ride height, spring preload, compression damping and rebound damping should be set methodically, starting from a known baseline and making controlled adjustments. Once the required ride height has been established, all suspension mounting hardware should be tightened to the appropriate specification and a full four-wheel geometry alignment carried out before final suspension tuning.