Description
Mazda FC3S RX-7 (85-91) BC Racing DS coilover kit 8/6 kg/mm
The BC Racing DS coilover kit RX-7 FC (part number N-06-DS-DA) 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.
The DS series is BC Racing’s track-focused coilover kit, and this version is the DS kit that BC Racing UK recommends for the RX-7 FC. It is intended for an FC that regularly goes on track and is also driven sportily on the road.
The digressive piston provides firmer damping at piston speeds of 0 to 50 mm/s, so the body stays composed under braking and turn-in. You set the damping in 30 clicks, the ride height independently of the spring preload. At the front there are pillowball top mounts, at the rear rubber or the original mounting.
Key benefits
- Digressive piston: more control over slow body movements.
- 30-click damping adjustment: compression and rebound set together.
- Ride height independent of spring preload: lower without giving up damper travel.
- Spring rate 8/6 kg/mm: the DS setup that BC Racing UK recommends for the FC.
- Pillowball top mounts at the front: pillowball or camber plate at the front, rubber or original at the rear.
- Satin chrome damper body: with concave lower lock ring.
- 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.
- Regular track days with the FC
- Sporty road use
- A step towards the track after the BR series
Technical specifications
- Manufacturer: BC Racing
- Part number: N-06-DS-DA
- Series: DS, track-focused
- Spring rate front/rear: 8/6 kg/mm
- Damper design: monotube with digressive piston, satin chrome damper body
- Damping: 30 clicks, compression and rebound simultaneously
- Ride height: adjustable via the damper body, independent of the spring preload
- 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. On some cars the pillowball top mount at the front requires a small modification to the upper mounting; if in doubt, contact us. After setting the ride height, have a new wheel alignment done. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If the kit is temporarily out of stock, you can still order and we will keep you informed.
BC Racing UK names the DS kit with 8/6 kg/mm springs and pillowball top mounts at the front as the recommended DS version for the Mazda RX-7 FC3S.
Why choose this DS coilover kit RX-7 FC?
Because it gives you the track-focused DS damping in the version that BC Racing UK recommends for the FC. The digressive piston keeps the body composed, with 30 clicks you tune between road and track, and the 8/6 kg/mm springs are stiffer than the 6/5 of the BR kit.
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 (this kit) | N-06-DS-DA | 8/6 | 30 clicks, digressive, pillowball top mounts front | Track-focused, sporty road use |
| RM | 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 DS and BR for the Mazda RX-7 FC?
The DS has a digressive piston and is track-focused, the BR has a linear piston and is intended for the road with the occasional track day. For the FC the DS has 8/6 kg/mm springs, the BR 6/5 kg/mm. Both kits have pillowball top mounts at the front.
Does the BC Racing DS coilover kit fit every Mazda RX-7 FC3S?
Yes. BC Racing approves the kit for the Mazda RX-7 FC from 1985 to 1991, without exclusions within that generation. On some cars the pillowball top mount at the front requires a small modification to the upper mounting; if in doubt, contact us.
Does the BC Racing DS coilover kit RX-7 FC have pillowball top mounts?
Yes. The DS coilover kit RX-7 FC has pillowball or camber plate top mounts at the front and rubber or the original mounting at the rear.
What is the delivery time of the BC Racing DS coilover kit for the Mazda RX-7 FC?
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 let you know when the kit 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.
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