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BMW 3 Series (E46) - BC Racing BR Series Coilover - excluding M3 1998 onwards

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The BC Racing BR Coilovers are a great value coilover suspension kit; suited for fast road and trackday use. The kit comes complete with rose jointed (pillowball) front top mounts, simple to use height and damping adjustment and even the option of custom springs at no extra cost. BC Racing produce two versions of the BR Series for the E46 BMW. The first is more geared towards fast road use with a front coilover combined with a separate spring and damper setup at the rear. The second version is more track orientated as it upgrades the rear to a full coilover unit for even more control over the setup.

Note: There are two versions of the E46 chassis, one of which has an offset top mount. You will need to check your car before ordering as it will determine which top mount design is required for correct fitment

These BC Racing BR Series coilovers fit the BMW 3 Series (E46) models (excluding the M3), manufactured from 1998 onwards. The RA-I-02 coilover kit uses a coilover damper at the front, with a separate spring and damper setup at the rear. For E46 owners wanting a rear coilover setup we can now supply the RA-I-31 suspension kit option which uses a true coilover at both the front and rear. The BR Series coilovers are height adjustable and feature 30 way damping adjustment with large oil capacity monotube bodies to improve damper performance.

The standard BMW 3 Series (E46) coilover kit comes with 7kg front springs and 8kg rear springs. Alternate spring-rates can be chosen at no extra cost to customise the BC Coilover kit to your specific needs. This kit comes with a rose jointed, pillowball front top mount and a rubber rear top mount. The front top mount included in the coilover kit is Camber adjustable as standard (I-02TM1), but you can choose to purchase the coilover kit with mounts that are both Camber and Caster adjustable (I-02TM2). For E46 owners where the chassis has an offset top mount as standard, we can supply a version of the BC mount which will enable correct fitment of the coilovers (I-02TM3 / I-02TM4).

  • 30 way adjustable damping - combined rebound and compression
  • Height adjustment via bottom mount to retain full damper travel
  • Large Diameter Monotube Damper Body (Nitrogen Filled)
  • Adjustable spring platform for corner weighting
  • Integrated bearing in top hat, improving steering feel
  • Custom Spring rates * made to order on request

BC Racing's most popular coilover setup; the BR series coilovers; are a fantastic choice for road driving or tarmac circuit use. BC have made it easy to access the adjustment knobs for tweaking the compression and rebound damping to suit whatever driving conditions you encounter. The BC Racing BR Coilovers have a clever ride height adjustment which does not affect spring preload and allows full damper travel at any ride height. By moving the whole damper body up or down in the hub bracket, ride height is adjusted without moving the spring platform. Unlike many of the other manufacturers the BR Series kits usually come with top mounts included. These mounts are either rose jointed pillowball mounts or rubber mounts depending on the type of kit available for the car.

BR Series
Front Coilover
Rear Coilover
Type RS
Inc Rubber Top Mount
Inc Rubber Top Mount
Type RA
Inc Pillowball Top Mount
Inc Rubber Top Mount / Non Top Mount
Type RH
Inc Pillowball Top Mount
Inc Pillowball Top Mount / Non Top Mount
Type RN
Without Top Mount
Inc Rubber Top Mount / Non Top Mount

BC Racing BR Series Features

46mm diameter pistons / 53mm diameter damper body

The BC Racing BR 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 simple adjustment of 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.

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

Manufacturer BC Racing
Model Part Number RA-I-02 / RH-I-31
Car Marque BMW
Car Model E46 3 Series excluding M3
Year of Manufacture 1998 onwards
Damper Design Mono-tube
Material of coilover strut black chromed steel
Suspension Type (Front) coilover damper
Suspension Type (Rear) RA-I-02: separate non coilover rear spring and damper assembly
RH-I-31: coilover damper
Dampening Adjustment 30 way adjustable damping - combined rebound and compression
Spring Rate (Road) Front: 7kg/mm Rear: 8kg/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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