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Description

BMW Z3 central top mounts (96-02) BC Racing RM coilover kit 6/6 kg/mm

The BC Racing RM coilover kit Z3 (part number I-10-RM-MA) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW Z3 with rear-wheel drive, including the Z3 M, model years 1996 to 2002. The spring rate is 6 kg/mm front and 6 kg/mm rear.

The RM series is intended for a Z3 that is mainly used on track days, in hill climbs or in tarmac rallies. On MacPherson struts, such as at the front of the Z3, BC Racing uses an inverted monotube; on other suspension types an upright monotube.

The spring rate stands out: for the Z3 the RM comes with 6 kg/mm front and rear, whereas the BR and DS have 5/8 kg/mm. The digressive piston and the fully synthetic oil with a very high viscosity index keep the damping stable as the dampers warm up. BC Racing UK lists this kit for the Z3 with original central top mounts.

Key benefits

• Inverted monotube at the front: on the MacPherson struts the damper sits upside down in the strut.
• Digressive piston: lots of control over slow body movements.
• Fully synthetic oil: very high viscosity index, so damping that changes less with temperature.
• Spring rate 6/6 kg/mm: equally stiff front and rear, unlike the BR and DS for the Z3.
• 30 clicks: compression and rebound adjusted together.
• Pillowball top mounts or camber plates at the front: with rubber or the original mounting at the rear.
• For heavy use: track days, hill climbs and tarmac rally.
• Rebuildable: the dampers can be rebuilt.

Suitable for

BMW Z3 with rear-wheel drive, including the Z3 M, model years 1996 to 2002; BC Racing UK lists this kit for cars with original central top mounts

• Track days and regular circuit work
• Hill climbs and tarmac rally
• A Z3 that rarely goes on the road

Technical specifications

• Manufacturer: BC Racing
• Part number: I-10-RM-MA
• Series: RM, inverted, for track days, hill climbs and tarmac rally
• Version: listed by BC Racing UK for the Z3 with original central top mounts
• Spring rate front/rear: 6/6 kg/mm
• Damper design: inverted monotube on MacPherson struts, upright monotube on other suspension types, digressive piston, fully synthetic oil with very high viscosity index
• Damping: 30 clicks, compression and rebound simultaneously
• Ride height: infinitely adjustable via the damper body
• Top mounts: pillowball top mounts or camber plates at the front, rubber or original mounting at the rear
• Contents: dampers and springs front and rear, lower mounts, top mounts where applicable, adjustment spanners and warranty card with serial number
• Warranty: 1 year on manufacturing defects; noise from track use is not covered by the warranty

Fitting and delivery

Before ordering, check whether your Z3 has central top mounts, because that is where BC Racing UK lists this kit. The kit is vehicle-specific and replaces the original dampers and springs. We recommend having it fitted by an experienced mechanic. On some cars the pillowball top mount at the front requires a small modification to the upper mounting; if in doubt, contact us. BC Racing advises periodic greasing of the RM and ZR series and recommends them less for road use than the BR, DS, ER or ZX. After adjusting the height and, where applicable, the camber, have the wheel alignment set again. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing temporarily has the kit out of stock, you can still order and we will tell you the delivery date.

The BC Racing RM for the BMW Z3 has a spring rate of 6/6 kg/mm, inverted dampers on the MacPherson struts and fully synthetic oil.

Why choose this RM coilover kit Z3?

A Z3 that mainly runs on the circuit, the hill or a rally stage needs suspension made for that. The RM keeps the damping stable over a long session and lets you tune the car in 30 steps. If you mainly drive on the road, the BR or DS suits your Z3 better.

BC Racing coilover kits for the BMW Z3

Overview of the BC Racing series for the BMW Z3 supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.

Frequently asked questions

What is the difference between the BC Racing RM and DS for the BMW Z3?

The RM coilover kit Z3 is made for track days, hill climbs and tarmac rally and has inverted dampers on the MacPherson struts, synthetic oil and 6/6 kg/mm; the DS is a track-focused monotube with 5/8 kg/mm that can also be used sportily on the road. Both have a digressive piston and 30 clicks.

Is the BC Racing RM for the Z3 suitable for daily use on the road?

Not primarily. BC Racing advises periodic greasing of the RM and recommends it less for road use than the BR or DS. For a Z3 that is driven a lot on the road, the BR and DS are the logical choice.

Does the BC Racing RM coilover kit fit every BMW Z3?

No, BC Racing UK only lists it for the Z3 with original central top mounts. That applies to the Z3 with rear-wheel drive from 1996 to 2002, including the Z3 M. For a Z3 with offset top mounts the fitment has not been confirmed; in that case, please contact us before ordering.

What is the delivery time of the BC Racing RM coilover kit for the Z3?

1 to 2 weeks, as long as the manufacturer has stock. If it is temporarily unavailable, you can still order and we will let you know when it arrives.

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.