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Description

BMW E46 3 Series True Rear Sedan/Coupe/Touring inverted (98-06) BC Racing RM coilover kit 6/5 kg/mm

The BC Racing RM coilover kit E46 True Rear (part number I-31-RM-MA) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW 3 Series E46 Sedan, Coupe and Touring with rear-wheel drive, model years 1998 to 2006, in True Rear version. The spring rate is 6 kg/mm front and 5 kg/mm rear.

With this inverted kit, the rear axle also gets a complete strut. The RM series is made for track days, hill climbs and tarmac rally.

True Rear means that the original rear layout of the E46, with a separate spring and a separate damper side by side, makes way for a coilover in which the spring sits around the damper. You then work with the same principle at the front and rear. The standard RM without True Rear (I-02) leaves the separate spring and damper in place at the rear.

At the front, on the MacPherson struts, the RM uses an inverted monotube that is stiffer against lateral forces. At the rear, where there is no MacPherson layout, an upright monotube with linear piston is used. The series has digressive tuning, with 30 clicks of adjustment and fully synthetic oil with an ultra-high viscosity index. The spring rate is 6/5 kg/mm.

Key benefits

• True Rear layout: a complete strut at the rear instead of a separate spring and damper.
• Inverted front struts: more stiffness under high cornering loads.
• Digressive tuning: tight under roll and dive.
• 30 clicks: compression and rebound together, per damper.
• Synthetic oil with an ultra-high viscosity index: consistent damping when things get hot.
• Camber plates as standard: supplied with suitable kits.
• Continuously adjustable ride height: via the damper body, front and rear.
• Spring rate 6/5 kg/mm: matching the True Rear layout.

Suitable for

BMW 3 Series E46 Sedan, Coupe and Touring, model years 1998 to 2006, with rear-wheel drive, in True Rear version (BC Racing part number I-31; not for the M3 and the Convertible)

• Track days and track use
• Hill climbs and tarmac rally
• Drivers looking for a stiffer kit without external reservoirs

Technical specifications

• Manufacturer: BC Racing
• Part number: I-31-RM-MA
• Series: RM, inverted
• Version: True Rear, a complete strut at the rear with the spring around the damper
• Spring rate front/rear: 6/5 kg/mm
• Damper design: inverted monotube on MacPherson, upright monotube with linear piston on non-MacPherson, digressive
• Damping: 30 clicks, compression and rebound simultaneously
• Ride height: continuously adjustable via the damper body
• Top mounts: pillowball top mounts or camber plates at the front, rubber or original mounting at the rear
• Contents: 4 struts with dampers and springs, lower mounts, top mounts where applicable, adjustment spanners and warranty card with serial number
• Warranty: 1 year on manufacturing defects. Noise from track-focused series is not covered by the warranty

Fitting and delivery

At the rear the separate spring disappears and is replaced by one coilover per side. Please note: BC Racing specifies that the body shell must be reinforced before fitting a True Rear kit. After fitting, set the ride height, check the clearance of the wheels and tyres and have a wheel alignment done on the E46. BC Racing advises periodic greasing of the RM series and recommends it less for road use than the BR, DS, ER or ZX. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If it is out of stock, you can still order and we will keep you informed.

Inverted front struts and a complete strut at the rear: this is how an E46 Sedan, Coupe or Touring gets the same precision on both axles.

Why choose this RM coilover kit E46 True Rear?

Because it combines the stiffness of an inverted kit with the adjustment freedom of a complete strut at the rear. You do not have to deal with reservoirs and extra lines, yet you get a kit made to go on track. A strong package for an E46 that regularly goes on track.

BC Racing coilover kits for the BMW E46 Sedan, Coupe and Touring in True Rear version

Overview of the BC Racing series for the BMW E46 Sedan, Coupe and Touring in True Rear version supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.

For the standard version without True Rear, BC Racing has separate kits for the E46 Sedan, Coupe, Touring and Compact. Their part numbers start with I-02. For the E46 Convertible, BC Racing has its own kit under part number I-90.

Frequently asked questions

What is the difference between the BC Racing RM True Rear and the standard RM for the E46?

The RM coilover kit E46 True Rear (I-31) replaces the separate spring and damper at the rear with a complete strut and has 6/5 kg/mm. The standard RM (I-02) keeps the original rear layout with separate spring and damper.

What is the difference between the BC Racing RM and DS for the E46 True Rear?

The RM has an inverted damper at the front for more stiffness in fast corners and comes with camber plates as standard on suitable kits. Both are digressive with 30 clicks.

What does inverted mean for the BC Racing RM coilover kit for the E46 True Rear?

With an inverted damper, the damper body is at the top and the piston rod at the bottom. That layout makes the MacPherson strut stiffer against lateral forces.

Does this BC Racing RM coilover kit E46 True Rear fit an E46 Touring or Convertible?

Yes for the Touring: BC Racing releases this True Rear kit for the rear-wheel drive E46 Sedan, Coupe and Touring, except the M3. For the Convertible, BC Racing has no True Rear kit, but its own standard kit under part number I-90.

What is the delivery time of this BC Racing RM coilover kit?

The delivery time is usually 1 to 2 weeks as long as the manufacturer has stock. If the kit is temporarily unavailable, you can still order and we will let you know the expected date.

Delivery outside the European Union: different shipping costs may apply. Don’t worry: we will email you as soon as possible after your order and agree the shipping with you. You are not committed to anything without your consent.