Shop

Description

Nissan Z34 370Z True Rear Fairlady Z (08-20) BC Racing ER coilover kit 10/8 kg/mm

The BC Racing ER coilover kit 370Z True Rear (part number D-121-ER) is a coilover kit adjustable in height and damping, also simply called a coilover, for the Nissan 370Z and Fairlady Z (Z34), model years 2008 to 2020, in True Rear version. The spring rate is 10 kg/mm front and 8 kg/mm rear.

The ER True Rear is for the 370Z that goes on track seriously. The dampers are monotube with a dual piston and external reservoir, and at the rear the Z34 gets a complete strut with the spring around the damper.

You set compression and rebound independently of each other, each in 30 clicks. The fully synthetic oil with a very high viscosity index and the digressive characteristic are made for intensive track use. This kit has firmer springs than the other True Rear kits: 10 kg/mm front and 8 kg/mm rear.

Key benefits

• True Rear: a complete strut at the rear with the spring around the damper.
• 2-way adjustable: compression and rebound independent, 30 clicks each.
• External reservoir: made for long sessions on track.
• Dual piston, digressive: firm control of slow body movements.
• Fully synthetic oil: with a very high viscosity index.
• Spring rate 10/8 kg/mm: firm, for track use.
• Camber plates on suitable kits: rubber top mounts optional.
• Rebuildable: the dampers can be rebuilt.

Suitable for

Nissan 370Z and Fairlady Z (Z34), model years 2008 to 2020, True Rear version

• Serious track and competition use
• Long sessions on track
• Drivers who want to adjust compression and rebound separately

Technical specifications

• Manufacturer: BC Racing
• Part number: D-121-ER
• Series: ER, 2-way with external reservoir
• Version: True Rear, a complete strut at the rear with the spring around the damper
• Spring rate front/rear: 10/8 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 independent, 30 clicks each
• Ride height: infinitely adjustable via the damper body
• Top mounts: camber plates on suitable kits, rubber top mounts optional
• Contents: 4 struts with dampers and springs, 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 all round. Please note: BC Racing specifies that the body shell must be reinforced before a True Rear kit is fitted. We recommend having it fitted by a mechanic with experience of reservoir dampers, and then having the wheel alignment set. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If the manufacturer does not have it in stock, you can still order and we will keep you informed of the delivery date.

The BC Racing D-121-ER is the 2-way True Rear coilover kit for the Nissan 370Z Z34, with external reservoir, 30 clicks compression and 30 clicks rebound.

Why choose this ER coilover kit 370Z True Rear?

With the ER True Rear, your 370Z gets competition technology front and rear. Because compression and rebound are adjustable independently of each other, you can precisely tune how the car turns in and recovers, with an external reservoir made for serious track work. The 10/8 kg/mm springs suit intensive track use.

BC Racing coilover kits for the Nissan 370Z (Z34) True Rear

Overview of the BC Racing series for the Nissan 370Z (Z34) True Rear supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.

For the standard version without True Rear, BC Racing has separate kits. Their part numbers start with D-30.

Frequently asked questions

What is the difference between the BC Racing ER and ZX True Rear coilover kits for the Nissan 370Z?

The ER is 2-way adjustable, the ZX 3-way. The ER has 30 clicks compression and 30 clicks rebound; the ZX splits the compression into low speed (20 clicks) and high speed (12 clicks). The ER coilover kit 370Z True Rear has 10/8 kg/mm, the ZX True Rear 9/5 kg/mm.

What does True Rear mean for the BC Racing ER coilover kit for the Nissan 370Z?

True Rear means that the 370Z also gets a complete strut at the rear, with the spring around the damper. The standard ER for the Z34 (D-30-ER) keeps a separate spring and damper at the rear and has 9/10 kg/mm. For True Rear, BC Racing specifies a reinforced body shell.

Does the BC Racing ER True Rear coilover kit fit every Nissan 370Z and Fairlady Z?

Yes, BC Racing releases this kit for the 370Z and Fairlady Z (Z34) from 2008 to 2020 and does not list any exceptions. If you are unsure about a Roadster or NISMO version, please contact us.

What is the delivery time of the BC Racing ER True Rear coilover kit for the Nissan 370Z?

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; we will let you know when the kit is in.

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.