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Description

BMW F80/F82 M3/M4 3-bolt True Rear (14-20) BC Racing ER coilover kit 6/6 kg/mm

The BC Racing ER coilover kit M3 M4 F80 3-bolt True Rear (part number I-132-ER) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW M3 F80 and M4 F82 with front top mounts secured by 3 bolts, model years 2014 to 2020, in True Rear version. The spring rate is 6 kg/mm front and 6 kg/mm rear.

The ER series is a 2-way adjustable coilover kit with external reservoir, made for serious track and competition use. You set compression and rebound independently of each other, each in 30 clicks, so you can tune the bump and rebound of the M3 or M4 separately to the circuit and tyres.

The monotube dampers have two pistons, a digressive characteristic and fully synthetic oil with a very high viscosity index. In this True Rear version the spring also sits around the damper at the rear. The kit is intended for cars with front top mounts secured by 3 bolts.

Key benefits

• 2-way adjustable: compression and rebound each in 30 clicks, independently of each other.
• External reservoir: monotube dampers with double piston and a separate reservoir.
• Digressive damping: firm control over slow body movements.
• Fully synthetic oil: with a very high viscosity index.
• True Rear: a coilover at the rear as well, with the spring around the damper.
• For 3-bolt top mounts: on the M3 F80 and M4 F82 with this front mounting.
• Concave lock ring: keeps the set ride height in place.
• Check valve as an option: alongside optional rubber top mounts.
• Rebuildable: the dampers can be rebuilt.

Suitable for

BMW M3 F80 Sedan and M4 F82 Coupe with rear-wheel drive, model years 2014 to 2020, with front top mounts secured to the strut tower with 3 bolts, in True Rear version. If the front top mounts are secured with 5 bolts, choose the I-133 kit. The M4 Convertible (F83) is not listed by BC Racing; please contact us for that version.

• Serious track days and club races with the M3 or M4
• Setting compression and rebound separately
• Tuning to semi-slicks or other track tyres

Technical specifications

• Manufacturer: BC Racing
• Part number: I-132-ER
• Series: ER, 2-way with external reservoir
• Version: True Rear (integrated rear, a complete strut at the rear with the spring around the damper), for cars with front top mounts secured by 3 bolts
• Spring rate front/rear: 6/6 kg/mm
• Damper design: monotube with double piston and external reservoir, digressive, fully synthetic oil with a very high viscosity index
• Damping: 2-way, 30 clicks compression and 30 clicks rebound, adjustable independently of each other
• Ride height: continuously 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. We recommend having it fitted by an experienced mechanic. Please note: BC Racing specifies that the body shell must be reinforced before a True Rear kit is fitted. Check beforehand that the front top mounts of your car are secured with 3 bolts. After adjusting the ride height, have the alignment re-measured and then fine-tune the damping step by step on a test day. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing cannot supply the kit straight away, you can still order it and we will keep you informed.

The BC Racing ER kit I-132-ER for the BMW M3 F80 and M4 F82 with 3-bolt top mounts has 30 clicks of compression and 30 clicks of rebound, adjustable independently of each other, and 6/6 kg/mm springs.

Why choose this ER coilover kit M3 M4 F80 3-bolt True Rear?

With a kit that has combined adjustment, compression and rebound always change together. With the ER you set them separately, so you can tune an M3 or M4 more precisely to a circuit, a type of tyre or your driving style. The external reservoir and the synthetic oil make the kit suitable for serious track work, and with True Rear the rear gets a complete strut as well.

BC Racing coilover kits for the BMW M3 F80 and M4 F82 True Rear with 3-bolt top mounts

Overview of the BC Racing series for the BMW M3 F80 and M4 F82 True Rear with 3-bolt top mounts supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.

For the standard version of the BMW M3 F80 and M4 F82 without True Rear, BC Racing has separate kits. Their part numbers start with I-49 (3-bolt top mounts) and I-68 (5-bolt top mounts). The True Rear kits for 5-bolt top mounts start with I-133.

Frequently asked questions

Which BC Racing ER True Rear coilover kit fits my BMW M3 F80 or M4 F82: I-132 or I-133?

The number of bolts on the front top mount decides: 3 bolts is I-132-ER, 5 bolts is I-133-ER. You count them on top of the front strut towers. If in doubt, send us a photo or your chassis number and we will help you choose the right kit.

Does the BC Racing ER True Rear coilover kit I-132-ER fit every BMW M3 F80 and M4 F82?

No, only the M3 F80 Sedan and M4 F82 Coupe with 3-bolt front top mounts, model years 2014 to 2020, with rear-wheel drive. For cars with 5-bolt top mounts there is the I-133-ER, and for the M4 Convertible (F83) the fitment has not been confirmed; please contact us in that case.

What is the difference between the BC Racing ER and ZX True Rear coilover kits for the BMW M3 F80 and M4 F82?

The ER is 2-way adjustable, the ZX 3-way. With the ZX you set not only the rebound but also the low-speed and high-speed compression separately, in 20 and 12 clicks. The ER coilover kit M3 M4 F80 3-bolt True Rear is intended for serious track use; the ZX for competition, long sessions and demanding drifting.

When will the BC Racing ER True Rear coilover kit for the BMW M3 F80 and M4 F82 be delivered?

Within 1 to 2 weeks as long as the manufacturer has stock. If BC Racing temporarily does not have the kit in stock, you can still order and we will let you know when it has arrived.

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.