BC Racing DS Series Coilover Kit – Mazda MX-5 Mk4 ND / RF 2015 Onwards • N-34-DS-DS

BC Racing N-34-DS-DS DS Series Coilover Kit

BC Racing DS Series coilover kit for Mazda MX-5 Mk4 ND / RF 1.5 and 2.0 2015 onwards applications listed in the compatibility table.

The DS Series develops the core BC Racing BR Series design with a digressive piston and damping curve, providing a more track-biased suspension characteristic while retaining the adjustability required for fast-road and regular track use.

The digressive damping design provides increased damping force at lower damper-shaft speeds to help control body roll, pitch, dive and rapid weight transfer during cornering, acceleration and braking. At higher shaft speeds, the damping characteristic allows the suspension to move more freely over bumps and kerbs, helping the tyre maintain contact with the road or track surface.

This complete four-corner suspension kit uses monotube dampers with 30-position simultaneous compression and rebound adjustment. Ride height can be adjusted independently from spring preload, giving greater flexibility when configuring the vehicle's ride height and suspension setup.

The current UK-listed default N-34-DS-DS configuration uses 5 kg/mm front and 2.5 kg/mm rear springs. Alternative spring rates may be available for more specialised road, track or competition applications.

• Product type: Complete coilover suspension kit
• Series: DS Series
• Configuration: DS-DS
• Primary use: Fast road, track day and track-focused use
• Location / system: Front and rear suspension
• Brand: BC Racing
• Product reference / part number: N-34-DS-DS
• Vehicle application: Mazda MX-5 / Miata Mk4 ND / RF 2015 onwards
• Engine applications: 1.5 and 2.0 SKYACTIV-G petrol
• Damper design: Monotube
• Valving: Digressive piston and damping curve
• Front spring rate: 5 kg/mm
• Rear spring rate: 2.5 kg/mm
• Damping adjustment: 30-position simultaneous compression / rebound adjustment
• Ride height adjustment: Adjustable independently from spring preload
• Front top mounts: Rubber-isolated upper mounts
• Rear top mount configuration: Rubber-isolated upper mounts or no supplied rear top mount depending on configuration
• Quantity supplied: Complete set of four coilovers

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. For track-focused use, professional corner weighting can also be considered once the required 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 adjustment and suspension geometry setup. Professional installation is recommended where suitable workshop equipment or suspension experience is not available.

Why BC Racing? BC Racing DS Series suspension combines digressive piston valving with monotube dampers, independently adjustable ride height and 30-position simultaneous compression/rebound adjustment. The digressive damping characteristic provides increased low-speed chassis control, making the DS Series particularly suited to drivers looking for a more track-biased setup while retaining useful adjustment for fast-road driving.

What’s in the box: Complete set of four BC Racing DS Series coilovers with front and rear dampers, 5 kg/mm front springs, 2.5 kg/mm rear springs, applicable upper mounting components, coilover adjustment spanners, installation documentation and associated components supplied with the N-34-DS-DS 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.