Description
BMW E36 M3 True Rear (92-99) BC Racing ZX coilover kit 6/6 kg/mm
The BC Racing ZX coilover kit E36 M3 True Rear (part number I-120-ZX) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW E36 M3, model years 1992 to 1999, in True Rear version. The spring rate is 6 kg/mm front and 6 kg/mm rear.
This kit is 3-way adjustable. With external reservoirs and three separate damping settings, it is made for competitive track work, long sessions and demanding drifting.
At the rear, True Rear gives the M3 a complete strut: the spring around the damper, instead of the separate spring and separate damper that the car has from the factory. The ZX itself combines the DS base with the reservoir technology of the ER, in an upright dual-piston monotube with race oil with a very high viscosity index.
The spring rate is 6/6 kg/mm. The ride height is infinitely adjustable via the damper body.
Key benefits
- 3-way damping: 20 clicks low-speed compression, 12 clicks high-speed compression, 30 clicks rebound.
- DS plus ER: digressive base with external reservoirs.
- True Rear for the M3: no more separate spring at the rear.
- Race oil: very high viscosity index for long, hot sessions.
- Dual-piston monotube: upright, with external reservoir.
- Replaceable upper mount: camber plates, rubber top mounts as an option.
- Spring rate 6/6 kg/mm: the same front and rear.
- Rebuildable: the kit can be rebuilt after intensive use.
Suitable for
BMW M3 E36, model years 1992 to 1999
- Competitive track work
- Long sessions at high pace
- Demanding drifting with an M3
Technical specifications
- Manufacturer: BC Racing
- Part number: I-120-ZX
- Series: ZX, 3-way, competition and heavy drifting
- Version: True Rear, a complete strut at the rear (spring around the damper) instead of a separate spring and separate damper
- Spring rate front/rear: 6/6 kg/mm
- Damper design: dual-piston monotube, upright, with external reservoirs
- Damping: 3-way digressive: low-speed compression 20 clicks, high-speed compression 12 clicks, rebound 30 clicks
- Ride height: infinitely adjustable via the damper body
- Top mounts: camber plates on a replaceable upper mount, rubber top mounts optional
- Oil: race oil, very high viscosity index
- 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 use is not covered by the warranty
Fitting and delivery
The front struts come out and at the rear the separate spring and damper are replaced by the coilover. Please note: BC Racing specifies that the body shell must be reinforced before fitting a True Rear kit. Plan the location of the reservoirs beforehand, so that the lines stay clear during suspension travel and steering. After setting the height, a new wheel alignment is part of the job. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If there is no stock, you can still order and we will keep you informed.
With three separate damping settings and, thanks to True Rear, coilovers all round, you set up an E36 M3 per axle and per damping phase.
Why choose this ZX coilover kit E36 M3 True Rear?
At competition level you want to be able to choose how the car reacts to a slow weight transfer and how it reacts to a hard kerb. The ZX gives you that choice separately, with rebound on top. Together with the True Rear rear axle, you tune the M3 down to the last detail for the circuit or the drift track.
BC Racing coilover kits for the BMW E36 M3 True Rear
Overview of the BC Racing series for the BMW E36 M3 True Rear supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.
| Series | Part number | Springs f/r | Damping | Intended for |
|---|---|---|---|---|
| BR | I-120-BR-RH | 6/6 | 30 clicks, linear | Road with the occasional track day |
| DS | I-120-DS-DH | 6/6 | 30 clicks, digressive | Track-focused, sporty road use |
| RM | I-120-RM-MA | 6/6 | 30 clicks, digressive, synthetic oil | Track days, hill climbs, tarmac rally |
| ER | I-120-ER | 6/6 | 2-way, 30 clicks per direction, external reservoir | Serious track and competition use |
| ZX (this kit) | I-120-ZX | 6/6 | 3-way (20/12/30 clicks), external reservoir | Competition, long sessions, drift |
For the E36 M3 in standard version, without True Rear, BC Racing has separate kits. Their part numbers start with I-26.
Frequently asked questions
What is the difference between the BC Racing ZX True Rear and the standard ZX for the E36 M3?
The standard ZX for the M3 (I-26-ZX) has a separate spring and separate damper at the rear and 6/9 kg/mm. This ZX coilover kit E36 M3 True Rear gives the rear a complete strut and has 6/6 kg/mm.
Should you choose the BC Racing ZX or the DS for the E36 M3?
Choose the DS for track days and the ZX for competition and long, heavy sessions. The DS is 1-way adjustable without reservoirs; the ZX builds on it with external reservoirs and 3-way adjustment.
Which top mounts are fitted to the BC Racing ZX for the E36 M3?
The ZX has a replaceable upper mount with camber plates; rubber top mounts are optional. If you are unsure what suits your M3, please contact us.
What is the delivery time of this BC Racing ZX coilover kit?
The delivery time is normally 1 to 2 weeks, as long as the manufacturer has stock. Otherwise you can still order and we will keep you informed.
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.




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