Description
Toyota A90 GR Supra (19+) BC Racing ER coilover kit 6/11 kg/mm
The BC Racing ER coilover kit Supra A90 (part number C-165-ER) is a coilover kit adjustable in height and damping, also simply called a coilover, for the rear-wheel drive Toyota GR Supra (A90), from model year 2019. The spring rate is 6 kg/mm front and 11 kg/mm rear.
The ER series is the 2-way adjustable coilover kit from BC Racing for serious track and competition use. You set compression and rebound in 30 clicks each, independently of each other, on monotube dampers with a double piston and an external reservoir.
For the GR Supra, the ER comes with springs that are slightly firmer than on the BR, DS and RM. Together with the digressive damping and the fully synthetic oil, this is a kit for those who use the A90 seriously on track and want to be able to choose the setup down to the last detail.
Key benefits
- 2-way adjustable: compression and rebound 30 clicks each, independently of each other.
- External reservoir: on monotube dampers with a double piston.
- Digressive damping: a lot of control during slow body movements.
- Fully synthetic oil: with a very high viscosity index.
- Spring rate 6/11 kg/mm: recommended by BC Racing for the ER on the A90.
- Concave lower lock ring: the set height stays locked.
- Camber plates on suitable kits: rubber top mounts are optional.
- Rebuildable: the dampers can be rebuilt.
Suitable for
Rear-wheel drive Toyota GR Supra A90, from model year 2019 (not for the BMW Z4 G29; for the True Rear version there are separate C-197 kits)
- Serious track use
- Competition and time attack
- Drivers who want to set compression and rebound independently of each other
Technical specifications
- Manufacturer: BC Racing
- Part number: C-165-ER
- Series: ER, 2-way for track and racing
- Spring rate front/rear: 6/11 kg/mm
- Damper design: monotube with double piston and external reservoir, digressive, fully synthetic oil
- Damping: 2-way, 30 clicks compression and 30 clicks rebound, independently adjustable
- Ride height: infinitely adjustable via the damper body
- Top mounts: 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
The kit is vehicle-specific and replaces the original dampers and springs. We recommend having it fitted by an experienced mechanic. Position the external reservoirs so that the lines are routed clear, and have the wheel alignment set again after adjusting the kit. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing temporarily has the kit out of stock, you can still order it and we will give you the expected delivery date.
The BC Racing C-165-ER is a 2-way adjustable coilover kit with external reservoir for the Toyota GR Supra A90, with 6 kg/mm front and 11 kg/mm rear.
Why choose this ER coilover kit Supra A90?
If you want to take your GR Supra on track seriously, you want to be able to set compression and rebound independently of each other. This ER kit lets you do that: 30 clicks each, with an external reservoir and digressive damping. This way you tune the car precisely to the circuit, the tyres and your driving style, and because the dampers are rebuildable, the kit lasts a long time.
BC Racing coilover kits for the Toyota GR Supra A90
Overview of the BC Racing series for the Toyota GR Supra A90 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 | C-165-BR-RA | 5/10 | 30 clicks, linear, pillowball top mounts front | Road with the occasional track day |
| DS | C-165-DS-DA | 5/10 | 30 clicks, digressive, pillowball top mounts front | Track-focused, sporty road use |
| RM | C-165-RM-MA | 5/10 | 30 clicks, digressive, synthetic oil, pillowball top mounts front | Track days, hill climbs, tarmac rally |
| ER (this kit) | C-165-ER | 6/11 | 2-way, 30 clicks per direction, external reservoir | Serious track and competition use |
| ZX | C-165-ZX | 18/8 | 3-way (20/12/30 clicks), external reservoir | Competition, long sessions, drifting |
For the Toyota GR Supra A90 True Rear, BC Racing has separate kits. Their part numbers start with C-197.
Frequently asked questions
What is the difference between the BC Racing ER and ZX coilover kits for the Toyota GR Supra A90?
The ER is 2-way adjustable (compression and rebound), the ZX is 3-way with separate low-speed and high-speed compression in addition to rebound. Both have an external reservoir. For the A90, the ER has 6/11 kg/mm and the ZX 18/8 kg/mm.
Does the BC Racing ER coilover kit fit every Toyota GR Supra A90?
Yes, BC Racing UK releases the C-165-ER for the rear-wheel drive GR Supra A90 from 2019, without mentioning any exceptions. A True Rear version of the ER is not in our range; for True Rear there are BR and DS kits with a C-197 number.
Can the BC Racing ER coilover kit for the Toyota GR Supra A90 also be used on a BMW Z4 G29?
No. BC Racing makes its own kit for the BMW Z4 G29 with a part number starting with I-97, even though the Z4 and the GR Supra share the same platform.
What is the delivery time of the BC Racing ER coilover kit for the Toyota GR Supra A90?
The ER coilover kit Supra A90 has a delivery time of 1 to 2 weeks as long as the manufacturer has stock. If it is temporarily sold out, you can still order it and we will let you know when it 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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