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Mazda MX5 (NB) - BC Racing DS Series Coilover - 1998 to 2005

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The BC Racing DS Coilovers are a superb coilover suspension kit for the MX-5 and are supplied with front and rear top mounts included. There are two versions of this MX5 coilover kit. The type DS kit comes with rubber top mounts and is suited for road where a quieter setup may be preferred. The BC Racing type DA kit comes with solid front top mounts and is more suited for track or drift cars. These kits have digressive valving, damping adjustment and even the option of custom springs at no extra cost.

The BC Racing DS Series coilovers are a versatile coilover suitable for both fast road and occasional track use. These BC Racing coilovers feature 30 way damping adjustment and are height adjustable. These BC Racing Coilovers use large oil capacity monotube bodies to improve damper performance. This BC Racing kit (DS-N-04 / DA-N-04) fits the Mazda MX5 Mk2 (NB) models from 1998 to 2005.

The default setup for the Mazda MX5 has an 8kg front spring, 6kg rear. If the car is mainly used on the road we recommend going for a slightly softer spring to maintain wheel traction at high speeds as the suspension will react faster to the dips and bumps in the road

  • Large Diameter Mono-tube damper with Digressive Valving
  • 30 way adjustable damping - combined rebound and compression
  • Height adjustment via bottom mount to retain full damper travel
  • Adjustable spring platform for corner weighting
  • Integrated bearing in top hat, improving steering feel
  • Custom Spring rates * made to order on request
  • fully rebuildable with all parts available for purchase
  • 1 year limited warranty against manufacturer defects

Please note we are unable to ship the BC Racing range to the following countries: France, The Netherlands, Finland, USA & Canada, China, Singapore, Taiwan, Japan, Malaysia, South Africa, Australia. If your country of residence is on this list then you have a local distributor. Please direct all enquiries to them. They will be able to get the complete BC Racing range.

The DS series is the latest evolution of the DR Series. BC Racing's DS Series Coilover system is built with Digressive Valving as well as offering the same great benefits of the BR Series models. It is considered a perfect choice for those who are looking for track orientated coilovers for occasional track days. The digressive valving offers more stability and enhances cornering ability at low shaft speed which gives you a different ride feel from the conventional linear valving.

DS Series
Front Coilover
Rear Coilover
Type DS
Inc Rubber Top Mount
Inc Rubber Top Mount
Type DA
Inc Pillowball Top Mount
Inc Rubber Top Mount / Non Top Mount
Type DH
Inc Pillowball Top Mount
Inc Pillowball Top Mount / Non Top Mount
Type DN
Without Top Mount
Inc Rubber Top Mount / Non Top Mount

BC Racing DS Series Features

Digressive Valving

The digressive valving offers more stability and enhances cornering ability at low shaft speed which gives you a different ride feel from the conventional linear valving

46mm diameter pistons / 53mm diameter damper body

The BC Racing DS series coilovers are similar to the V1 series coilover kits but use a larger 46mm diameter piston in a 53mm diameter damper body to maximise the oil capacity. the larger outer shafts also give additional strength enabling them to cope with higher side loads.

Rebound & Compression Damping Adjustment

BC Racing BR Coilovers have 30 clicks of rebound and compression damping adjustment allowing you to adjust the way your vehicle handles; fine tuning the front and rear balance to suit different track and race disciplines.

Standard Features of all BC Racing Coilovers

Ride Height Adjustment

BC Racing Coilovers alter ride height using an adjustable bottom mount. As ride height is set by this bottom mount rather than the spring platform your BC Racing Coilover retains full damper travel no matter what your ride height. This also allows the BC Racing Coilover spring pre-load to be set independently.

Nitrogen pressurised Monotube Coilovers

The BC Racing coilover kits use Nitrogen pressurised Monotube dampers with a large diameter pistons and bodies. Mono-tube pistons are much larger than twin-tube coilover dampers. This allows it to be more sensitive to small suspension movements. The larger outer shafts are stronger so they cope with higher side loads. These increased lateral loads occur when stick tyres are used or when a car may go airborne over crests in the road at high speed. Nitrogen pressurised Monotube coilover dampers give a more consistent damping performance and do not suffer from aeration or performance fade in comparison to a twin tube BC Racing Suspensiondamper design.

Corner weight adjustment

The lower spring platforms of the BC Racing coilovers are adjustable. This allows the car to be set up for corner weighting to achieve perfect balance and ensures that maximum tyre efficiency is achieved.

The car needs to be placing equal weight on each tyre on an axle so both front tyres need to be taking equal loading as do both rears. This makes sure that both tyres are doing their equal share of work when cornering which increases overall grip, maximises corner speed and reduces lap times.

Corrosion protection

The BC Racing Coilover damper units are black chromed steel to give superb durability against the weather and road salt in winter. The aluminium components are anodised and the steel lower mounts go through an electrocoating process followed by powder coating. To keep them looking like new we recommend using a anti-rust barrier spray such as ACF-50

Top mounts included on most kits

Many of the BC Racing coilover kits come with complete with replacement top mounts. These BC Racing top mounts are either rose jointed (pillowball) top mounts or rubber top mounts. The anodised alloy top mounts eliminate any flex or play associated with the standard rubber top mounts, improving response and handling. In addition some of the BC Racing coilover kits also allow for camber / castor adjustment through the solid top mounts to give additional tuning flexibility.

Optional BC Racing Damping Extenders

The BC Racing coilover kits are available to be purchased with rear damping extender cables. If chosen these allow you to adjust the 30 way damping from a more convenient position on the car. Three lengths are available and these can be cut down to size.

Custom spring rates at no extra cost

Kam Racing are able to supply the BC Racing coilover kits with spring rates of your choice at no extra cost. Simply provide the specs you require in the order comments and we will arrange this for you..

Additional Information

Car Marque Mazda
Manufacturer BC Racing
Model Part Number DS-N-04 / DA-N-04
Car Model MX5 Mk2 (NB8C)
Year of Manufacture 1998 to 2005
Damper Design Mono-tube
Material of coilover strut black chromed steel
Dampening Adjustment 30 way adjustable damping - combined rebound and compression
Spring Rate (Road) Front: 8kg/mm Rear: 6kg/mm
TUV Certification Factory has TUV approval for manufacturing process: Individual Items not TUV certified. Technical Drawings and Letter of conformity available on request

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