BC Racing N-34-BR-RS BR Series RS Coilover Kit
BC Racing BR Series RS coilover kit for Mazda MX-5 Mk4 ND / RF 1.5 and 2.0 2015 onwards applications listed in the compatibility table.
The BR Series is BC Racing's versatile adjustable coilover range, designed to provide a practical balance of road usability, ride-height adjustment and suspension tuning for road, fast-road and occasional track-day use.
This complete four-corner suspension kit uses monotube dampers with 30-position combined compression and rebound adjustment. Ride height can be adjusted independently from spring preload, allowing the vehicle height to be changed while retaining the intended spring and damper operating range.
The RS configuration uses a rubber-isolated upper mounting arrangement where supplied for the application, making it the more road-orientated BR configuration and helping to reduce the additional noise and harshness associated with rigid pillowball mounting arrangements.
The standard N-34-BR-RS configuration uses 5 kg/mm front and 2.5 kg/mm rear springs, providing a setup intended to balance improved chassis control with everyday road usability.
- Product type: Complete coilover suspension kit
- Series: BR Series
- Configuration: RS
- Primary use: Road, fast road and occasional track day
- Location / system: Front and rear suspension
- Brand: BC Racing
- Product reference / part number: N-34-BR-RS
- Vehicle application: Mazda MX-5 / Miata Mk4 ND / RF 2015 onwards
- Engine applications: 1.5 and 2.0 SKYACTIV-G petrol
- Damper design: Monotube
- Front spring rate: 5 kg/mm
- Rear spring rate: 2.5 kg/mm
- Damping adjustment: 30-position combined compression / rebound adjustment
- Ride height adjustment: Adjustable independently from spring preload
- Front top mount: Rubber-isolated upper mount
- Rear top mount configuration: Rubber-isolated or application-specific supplied mounting arrangement
- Quantity supplied: Complete four-corner coilover suspension kit
Fitment advice: Designed for Mazda MX-5 Mk4 ND and RF applications from 2015 onwards, including the applicable 1.5 and 2.0 SKYACTIV-G 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. A full four-wheel geometry alignment should be carried out 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 equipment will be required for final geometry setup.
Difficulty guide: DIY Difficulty: Advanced. Installation requires removal and replacement of the complete front and rear suspension assemblies, followed by careful ride-height setup and a full four-wheel geometry alignment. Professional installation is recommended where suitable workshop equipment or suspension experience is not available.
Why BC Racing? BC Racing BR Series suspension provides a practical balance between road usability and suspension adjustability for fast-road and occasional track-day use. Monotube dampers, independently adjustable ride height and 30-position combined damping adjustment provide considerably greater control over suspension setup than a conventional fixed spring and damper package.
What’s in the box: Complete four-corner BC Racing BR Series RS coilover suspension kit with front and rear dampers, 5 kg/mm front springs, 2.5 kg/mm rear springs, applicable rubber-isolated upper mounting components, coilover adjustment tools and associated components supplied with the N-34-BR-RS kit.
Installation / setup notes: Ride height, spring preload and damping should be set methodically during installation. 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 setup.
| Make | Model | Sub Variant | Chassis / Code | Years | Power (PS) | Engine Codes | Fuel | Transmission | Notes |
|---|---|---|---|---|---|---|---|---|---|
| Mazda | MX-5 | Mk4 / ND1 Roadster – 1.5 | ND | 2015–2018 | 131 | P5-VPS | Petrol | 6 Speed Manual | BC Racing BR Series RS; N-34-BR-RS; 5 kg/mm front / 2.5 kg/mm rear; monotube dampers; 30-position combined compression/rebound adjustment. |
| Mazda | MX-5 | Mk4 / ND1 Roadster – 2.0 | ND | 2015–2018 | 160 | PE-VPS | Petrol | 6 Speed Manual | BC Racing BR Series RS; N-34-BR-RS; 5 kg/mm front / 2.5 kg/mm rear; independently adjustable ride height. |
| Mazda | MX-5 RF | Mk4 / ND1 RF – 1.5 / 2.0 | ND | 2017–2018 | 131–160 | P5-VPS / PE-VPS | Petrol | Manual / Automatic where fitted | BC Racing BR Series RS; N-34-BR-RS; RF application; 5 kg/mm front / 2.5 kg/mm rear. |
| Mazda | MX-5 | Mk4 / ND2+ Roadster – 1.5 | ND | 2018–Present | 132 | P5-VPS | Petrol | 6 Speed Manual | BC Racing BR Series RS; N-34-BR-RS; 5 kg/mm front / 2.5 kg/mm rear; ND application. |
| Mazda | MX-5 | Mk4 / ND2+ Roadster – 2.0 | ND | 2018–Present | 184 | PE-VPS | Petrol | 6 Speed Manual | BC Racing BR Series RS; N-34-BR-RS; 5 kg/mm front / 2.5 kg/mm rear; ND application. |
| Mazda | MX-5 RF | Mk4 / ND2+ RF – 1.5 / 2.0 | ND | 2018–Present | 132–184 | P5-VPS / PE-VPS | Petrol | Manual / Automatic where fitted | BC Racing BR Series RS; N-34-BR-RS; RF application; 5 kg/mm front / 2.5 kg/mm rear. |
| Reference Type | Reference |
|---|---|
| BC Racing Product Reference | N-34-BR-RS |
| BC Racing Series | BR Series – RS |
| Vehicle Application | Mazda MX-5 / Miata ND / RF 2015 onwards |