Description
BC Racing ER coilover kit Nissan Skyline R34 GTS RWD rear fork (98-01) 12/10 kg/mm
The BC Racing ER coilover kit Skyline R34 rear fork (part number D-18-ER) is a coilover kit adjustable in height and damping, also simply called a coilover, for the Nissan Skyline R34 GTS and GT-t with rear-wheel drive (ER34) and a rear fork mounting of the rear dampers, model years 1998 to 2001. The spring rate is 12 kg/mm front and 10 kg/mm rear.
This ER is for the R34 GTS that truly belongs on the circuit. BC Racing builds the ER series around a monotube with dual piston and external reservoir, filled with fully synthetic oil with a very high viscosity index. Compression and rebound each have their own knob with 30 clicks, the damping is digressive and you adjust the ride height continuously via the damper body.
The spring rate stands out: BC Racing supplies the ER for the rear fork version with 12 kg/mm front and 10 kg/mm rear, considerably stiffer than the 8/5 kg/mm of the BR, DS and ZX for this car. Also check the lower mounting of your rear dampers. This kit is for a fork, a U-shaped bracket. If your R34 has an eye with a through bolt there, you need the D-72-ER.
Key benefits
- Compression and rebound separately: 2-way, each in 30 clicks.
- Stiff 12/10 kg/mm: the spring rate BC Racing specifies for this ER.
- External reservoir: with a dual piston in a monotube damper.
- Synthetic oil: with a very high viscosity index.
- Digressive: firmer damping at slow body movements.
- Concave lock ring: locks the ride height in place.
- Camber plates: with rubber top mounts as an option.
- Rear fork version: for the fork at the bottom of the rear damper.
- Rebuildable: the dampers can be rebuilt.
Suitable for
Nissan Skyline R34 GTS and GT-t with rear-wheel drive (ER34), model years 1998 to 2001, with a fork at the bottom of the rear damper (rear fork). Not for R34s with rear eye dampers and not for the four-wheel-drive versions, including the GT-R.
- Circuit racing and serious track days
- An R34 that is mainly driven on the track
- Fine-tuning compression and rebound for each circuit
Technical specifications
- Manufacturer: BC Racing
- Part number: D-18-ER
- Series: ER, 2-way with external reservoir
- Version: rear fork, the rear damper has a fork as its lower mounting
- Spring rate front/rear: 12/10 kg/mm
- Damper design: monotube with dual piston and external reservoir, digressive, fully synthetic oil with a very high viscosity index
- Damping: 2-way, compression and rebound independently adjustable, 30 clicks each
- Ride height: continuously adjustable via the damper body
- Top mounts: camber plates, 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; with this track-focused series, noise is not covered by the warranty
Fitting and delivery
The ER replaces the original dampers and springs of the R34 with rear fork dampers. Have an experienced mechanic install the kit and then have a wheel alignment carried out at the ride height you choose. For the first drive, set the damping to the middle of the range and then adjust one knob at a time. As long as the manufacturer has stock, the delivery time is 1 to 2 weeks. If it is out of stock, you can still order and we will let you know the delivery date.
BC Racing supplies the ER for the rear-wheel-drive Skyline R34 with rear fork dampers with 12 kg/mm front and 10 kg/mm rear, stiffer than the BR, DS and ZX for the same car.
Why choose this ER coilover kit Skyline R34 rear fork?
On a circuit car you want to be able to tune compression and rebound independently of each other, and this 2-way ER lets you do that. Together with the stiffer 12/10 kg/mm springs and the external reservoir, this is a kit for an R34 GTS that spends a lot of time on track. After a season you can have the dampers rebuilt.
BC Racing coilover kits for the Nissan Skyline R34 GTS (RWD) with rear fork dampers
Overview of the BC Racing series for the Nissan Skyline R34 GTS (RWD) with rear fork dampers 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-18-BR-RS | 8/5 | 30 clicks, linear, rubber top mounts front | Road with the occasional track day |
| DS | D-18-DS-DS | 8/5 | 30 clicks, digressive, rubber top mounts front | Track-focused, sporty road use |
| ER (this kit) | D-18-ER | 12/10 | 2-way, 30 clicks per direction, external reservoir | Serious circuit and competition use |
| ZX | D-18-ZX | 8/5 | 3-way (20/12/30 clicks), external reservoir | Competition, long sessions, drift |
For the Nissan Skyline R34 GTS (RWD) with rear eye dampers, BC Racing has separate kits. Their part numbers start with D-72.
Frequently asked questions
Does the BC Racing ER for the Skyline R34 rear fork have the same springs as the BR and DS?
No. The ER coilover kit Skyline R34 rear fork comes with 12/10 kg/mm, whereas the BR, DS and ZX for this car have 8/5 kg/mm. If you want a different spring rate, contact us and we will look into the options for you.
Which BC Racing ER fits my Nissan Skyline R34 GTS: rear fork or rear eye?
That is determined by the lower mounting of your rear damper. With a fork, this D-18-ER fits; with an eye with a through bolt, the D-72-ER. If in doubt, contact us first and we will help you choose the right kit.
What is the difference between the BC Racing ER and ZX for the Skyline R34 GTS rear fork?
The ER is 2-way with compression and rebound each in 30 clicks; the ZX is 3-way and splits the compression into 20 clicks low speed and 12 clicks high speed. For the rear fork version, the ER has 12/10 kg/mm and the ZX 8/5 kg/mm.
Does the BC Racing ER D-18-ER fit an R34 GT-R?
No, this kit is only for the R34 GTS and GT-t with rear-wheel drive and rear fork dampers. For the GT-R R33 and R34, BC Racing has the D-08-ER.
What is the delivery time of the BC Racing ER coilover kit for the Skyline R34 rear fork?
1 to 2 weeks as long as the manufacturer has stock. If the kit is not in stock, you can still order and we will keep you informed of the delivery date.
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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