Description
Mazda FC3S RX-7 (85-91) BC Racing RM coilover kit 8/6 kg/mm
The BC Racing RM coilover kit RX-7 FC (part number N-06-RM-MA) is a coilover kit adjustable in height and damping, also simply called a coilover, for the Mazda RX-7 FC3S, model years 1985 to 1991. The spring rate is 8 kg/mm front and 6 kg/mm rear.
BC Racing’s RM series is made for track days, hill climbs and tarmac rally. For the RX-7 FC it is a kit for those who mainly use the car for that kind of work, and less for daily driving.
On MacPherson struts the RM uses an inverted monotube, on other suspension types an upright monotube. The damping is digressive and adjustable in 30 clicks, and the dampers are filled with fully synthetic oil with an ultra-high viscosity index. Camber plates are standard on suitable kits.
Key benefits
- Inverted monotube on MacPherson struts: upright monotube on other suspension types.
- Digressive damping: firm control during slow body movements.
- 30-click damping adjustment: compression and rebound set together.
- Fully synthetic oil: with an ultra-high viscosity index.
- Pillowball top mounts at the front: pillowball or camber plate at the front, rubber or original at the rear.
- Spring rate 8/6 kg/mm: for the RX-7 FC3S.
- Rebuildable: the dampers can be rebuilt.
Suitable for
Mazda RX-7 FC3S, model years 1985 to 1991. BC Racing lists no exclusions within this generation.
- Track days
- Hill climbs
- Tarmac rally
Technical specifications
- Manufacturer: BC Racing
- Part number: N-06-RM-MA
- Series: RM, for track days, hill climbs and tarmac rally
- Spring rate front/rear: 8/6 kg/mm
- Damper design: inverted monotube on MacPherson struts, upright monotube on other suspension types
- Damping: 30 clicks, compression and rebound simultaneously, digressive, fully synthetic oil
- Ride height: steplessly adjustable via the damper body
- Top mounts: pillowball or camber plate front, rubber or original 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 this track-focused series is not covered by the warranty
Fitting and delivery
The kit is vehicle-specific and replaces the original dampers and springs. We recommend having it fitted by an experienced mechanic and having the wheel alignment redone after setting the ride height. 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. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing does not have the kit in stock, you can still order and we will let you know when it arrives.
BC Racing developed the RM series for track days, hill climbs and tarmac rally, with inverted monotube dampers on MacPherson struts.
Why choose this RM coilover kit RX-7 FC?
Because the RM series is made for the work an FC is often built for: track days, hill climbs and tarmac rally. You get digressive damping in 30 clicks, synthetic oil and pillowball top mounts at the front. If you mainly drive on the road, look at the BR or DS first, which BC Racing recommends more for that.
BC Racing coilover kits for the Mazda RX-7 FC3S
Overview of the BC Racing series for the Mazda RX-7 FC3S 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 | N-06-BR-RA | 6/5 | 30 clicks, linear, pillowball top mounts front | Road with the occasional track day |
| DS | N-06-DS-DA | 8/6 | 30 clicks, digressive, pillowball top mounts front | Track-focused, sporty road use |
| RM (this kit) | N-06-RM-MA | 8/6 | 30 clicks, digressive, synthetic oil, pillowball top mounts front | Track days, hill climbs, tarmac rally |
| ER | N-06-ER | 9/7 | 2-way, 30 clicks per direction, external reservoir | Serious track and competition use |
| ZX | N-06-ZX | 8/6 | 3-way (20/12/30 clicks), external reservoir | Competition, long sessions, drifting |
For the Mazda RX-7 FD3S, BC Racing has separate kits. Their part numbers start with N-02.
Frequently asked questions
What is the difference between the BC Racing RM and DS for the Mazda RX-7 FC?
The RM is made for track days, hill climbs and tarmac rally, the DS for track use combined with sporty road use. Both have 30 clicks and 8/6 kg/mm springs for the FC. The RM uses fully synthetic oil, needs periodic greasing and is recommended less for the road by BC Racing than the DS.
Does the BC Racing RM coilover kit fit every Mazda RX-7 FC3S?
Yes. BC Racing approves this kit for the Mazda RX-7 FC from 1985 to 1991 and lists no exclusions within that generation. If you are unsure about your version, please contact us. For the RX-7 FD3S we stock BC Racing kits from the BR, DS, ER and ZX series.
Is the BC Racing RM coilover kit RX-7 FC suitable for road use?
Not primarily. BC Racing recommends the RM coilover kit RX-7 FC less for road use than the BR, DS, ER or ZX, and the kit needs periodic greasing. It is made for track days, hill climbs and tarmac rally.
What is the delivery time of the BC Racing RM coilover kit for the Mazda RX-7 FC?
The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing is temporarily out of stock, 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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