Description
BC Racing ER coilover kit Nissan Silvia S13 240SX camber/caster top mounts (89-94) 8/6 kg/mm
The BC Racing ER coilover kit S13 (part number D-12-ER) is a coilover kit adjustable in height and damping, also simply called a coilover, for the Nissan Silvia, 180SX, 200SX and 240SX on the S13 platform, model years 1989 to 1994. The spring rate is 8 kg/mm front and 6 kg/mm rear.
With this kit you set up the S13 for serious track and competition work. The ER is a monotube with a dual piston and an external reservoir, on which you set compression and rebound independently of each other.
This version comes with camber/caster top mounts at the front, giving you more room for adjustment in the alignment of the front axle. For an S13 that has to work hard on track or in drifting, that is a big advantage: you set the steering feel and front grip the way you want.
The spring rate is 8/6 kg/mm, firmer than the standard road kits and suited to a car that is really used. According to BC Racing, this kit also fits the A31.
Key benefits
- 2-way adjustable: compression and rebound each separately in 30 clicks.
- Camber/caster top mounts at the front: more freedom in the alignment of the front axle.
- External reservoir: more oil volume, so more consistent damping under load.
- Dual piston, digressive: firm against roll, supple over fast bumps.
- Fully synthetic oil: with a very high viscosity index for stable behaviour when it gets hot.
- Spring rate 8/6 kg/mm: firm enough for track and drift.
- Concave lock ring: keeps the ride height setting in place.
- Rebuildable: remains usable for years.
Suitable for
Nissan Silvia, 180SX, 200SX and 240SX on the S13 platform, model years 1989 to 1994
- Serious track use and track days
- Drifting where you want to play with camber and caster at the front
- Competition cars that need a 2-way setup
Technical specifications
- Manufacturer: BC Racing
- Part number: D-12-ER
- Series: ER, external reservoir, track and competition
- Spring rate front/rear: 8/6 kg/mm
- Damper design: monotube with dual piston and external reservoir, digressive
- Damping: 2-way, 30 clicks compression and 30 clicks rebound, independent
- Ride height: infinitely adjustable via the damper body
- Top mounts: camber/caster top mounts at the front, 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 is not covered by the warranty
Fitting and delivery
The kit replaces the original struts and dampers all round. Mount the reservoirs securely and away from hot parts. Because the front top mounts are adjustable for camber and caster, a full wheel alignment after fitting is really necessary. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If the manufacturer temporarily does not have it in stock, you can still order and we will keep you informed.
Separate compression and rebound plus adjustable camber and caster at the front: that is how you build an S13 that goes exactly where you steer it.
Why choose this ER coilover kit S13?
Because with a 1-way damper you eventually run into a limit: firmer for turn-in makes the car unsettled on rebound. The ER solves this by separating compression and rebound. Together with the camber/caster top mounts, you have everything in hand to set up the S13 properly for each track.
BC Racing coilover kits for the Nissan S13
Overview of the BC Racing series for the Nissan S13 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 | D-12-BR-RA | 6/4 | 30 clicks, linear | Road with the occasional track day |
| DS | D-12-DS-DA | 6/4 | 30 clicks, digressive | Track-focused, sporty road use |
| RM | D-12-RM-MA, inverted | 10/8 | 30 clicks, digressive, synthetic oil | Track days, hill climbs, tarmac rally |
| ER (this kit) | D-12-ER, camber/caster top mounts | 8/6 | 2-way, 30 clicks per direction, external reservoir | Serious track and competition use |
| ZX | D-12-ZX | 6/4 | 3-way (20/12/30 clicks), external reservoir | Competition, long sessions, drift |
| ZR | D-12-ZR | 6/4 | 3-way (20/12/30 clicks), external reservoir | Competitive motorsport |
Frequently asked questions
What is the difference between the BC Racing ER and RM for the Nissan S13?
The ER coilover kit S13 has an external reservoir and lets you set compression and rebound independently of each other, while the RM is a 1-way damper with 30 clicks on which compression and rebound are adjusted together.
Why does this BC Racing ER coilover kit for the Nissan S13 have camber/caster top mounts?
With the camber/caster top mounts you can adjust both the camber and the caster at the front. That gives you more options to tune grip and steering feel to your driving style.
Does the BC Racing ER coilover kit S13 fit a Nissan 180SX?
Yes, the kit is intended for the Silvia, 180SX, 200SX and 240SX on the S13 platform from 1989 to 1994.
Can I order the BC Racing ER coilover kit for the Nissan S13 if it is not in stock?
Yes, you can still order it and we will let you know when it arrives. The delivery time is 1 to 2 weeks as long as the manufacturer has stock.
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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