Description
BMW E81/E82/E87 1 Series Hatchback/Coupe (04-13) BC Racing ZX coilover kit 5.5/8 kg/mm
The BC Racing ZX coilover kit E87 E82 (part number I-11-ZX) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW 1 Series E81, E82 and E87, excluding the 1M Coupe, model years 2004 to 2013. The spring rate is 5.5 kg/mm front and 8 kg/mm rear.
The BC Racing ZX series combines the DS and the ER into a 3-way adjustable coilover kit. It is intended for competitive track use, long sessions and demanding drifting, and fits the 1 Series E81, E82 and E87, but not the 1M Coupe.
The upright monotube dampers have a double piston and an external reservoir, filled with racing oil with a very high viscosity index. You set the compression separately for low speed (20 clicks) and high speed (12 clicks), and the rebound in 30 clicks. The springs are 5.5 kg/mm front and 8 kg/mm rear.
Key benefits
- 3-way adjustable: low-speed and high-speed compression separately (20 and 12 clicks), rebound in 30 clicks.
- External reservoir: with a double piston in an upright monotube.
- Racing oil: with a very high viscosity index.
- Digressive damping: the body stays composed during slow movements.
- Spring rate 5.5/8 kg/mm: for the 1 Series E81, E82 and E87.
- Replaceable upper mounting: camber plates on suitable kits, rubber top mounts optional.
- Continuously adjustable ride height: via the damper body.
- Rebuildable: the dampers can be rebuilt.
Suitable for
BMW 1 Series E81 (3-door), E87 (5-door) and E82 Coupe, model years 2004 to 2013; not for the 1M Coupe and not for the E88 Convertible
- Competitive track use and long sessions
- Demanding drifting with the 1 Series
- Tuning compression separately for low and high speed
Technical specifications
- Manufacturer: BC Racing
- Part number: I-11-ZX
- Series: ZX, 3-way with external reservoir
- Spring rate front/rear: 5.5/8 kg/mm
- Damper design: upright monotube with double piston and external reservoir, digressive, racing oil with a very high viscosity index
- Damping: 3-way, 20 clicks low-speed compression, 12 clicks high-speed compression, 30 clicks rebound
- Ride height: continuously adjustable via the damper body
- Top mounts: replaceable upper mounting, camber plates on suitable kits, rubber top mounts optional
- 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
This vehicle-specific kit replaces the original dampers and springs. We recommend having it fitted by an experienced mechanic. After lowering, have the wheel alignment reset, because camber and toe change as well. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing briefly does not have the kit in stock, you can still order and we will tell you the delivery date.
The BC Racing ZX kit I-11-ZX for the BMW 1 Series E81, E82 and E87 offers 3-way damping with 20 clicks of low-speed compression, 12 clicks of high-speed compression and 30 clicks of rebound.
Why choose this ZX coilover kit E87 E82?
The compact, rear-wheel drive 1 Series lends itself well to drifting and track work. With the ZX you tune the compression separately for slow and fast movements, for example supple over the kerbs and firm on turn-in. That way you build a 1 Series that can handle long sessions and responds the way you have set it up.
BC Racing coilover kits for the BMW 1 Series E81/E82/E87
Overview of the BC Racing series for the BMW 1 Series E81/E82/E87 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-11-BR-RA | 5.5/8 | 30 clicks, linear, pillowball top mounts front | Road with the occasional track day |
| DS | I-11-DS-DA | 5.5/8 | 30 clicks, digressive, pillowball top mounts front | Track-focused, sporty road use |
| RM | I-11-RM-MA | 5.5/8 | 30 clicks, digressive, synthetic oil, pillowball top mounts front | Track days, hill climbs, tarmac rally |
| ER | I-11-ER | 8/12 | 2-way, 30 clicks per direction, external reservoir | Serious track and competition use |
| ZX (this kit) | I-11-ZX | 5.5/8 | 3-way (20/12/30 clicks), external reservoir | Competition, long sessions, drifting |
For the BMW 1 Series E88 Convertible, BC Racing has separate kits. Their part numbers start with I-149.
Frequently asked questions
Does the BC Racing ZX coilover kit I-11 fit the BMW 1M Coupe or the E88 Convertible?
No, this kit is for the 1 Series E81, E87 and E82 Coupe, with the exception of the 1M Coupe. For the 1M Coupe there are the kits starting with I-21, for the E88 Convertible the BR kit I-149-BR-RA.
What does the BC Racing ZX offer over the ER for the BMW 1 Series E87?
The ZX offers 3-way adjustment, the ER 2-way. With the ZX coilover kit E87 E82 you set the compression separately for low and high speed (20 and 12 clicks), plus 30 clicks of rebound. Besides competitive track use, BC Racing also describes the ZX as suitable for demanding drifting; the springs are 5.5/8 kg/mm, compared with 8/12 kg/mm on the ER.
Can the BC Racing ZX coilover kit for the BMW E82 be rebuilt?
Yes, the dampers can be rebuilt. That is useful after seasons with long sessions. Noise from track use is not covered by the warranty; manufacturing defects are covered for 1 year.
What is the delivery time of the BC Racing ZX coilover kit for the BMW 1 Series E81, E82 and E87?
The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If it is briefly sold out, you can still order the kit and you will hear from us as soon as it is on its way.
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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