BMW Motorsport M2 CS Racing/M4 GT4 Rear Flange

Product Description

The BMW Motorsport Rear Flange Hub Upgrade is a genuine BMW Motorsport component developed for the BMW M2 CS Racing and BMW M4 GT4, designed to improve rear hub durability under endurance, sprint and high-load track conditions.

Standard F8X rear hub flanges can be vulnerable to stress cracking around the outer hubcentric surface during sustained motorsport use. This upgraded Motorsport flange uses a thicker, full-face hubcentric design to increase strength, reinforce the contact area and distribute load more effectively.

Manufactured from motorsport-grade forged and heat-treated steel, the hub flange maintains OEM geometry and fitment while providing increased reliability for track-prepared and competition-spec BMW M cars. It is a direct replacement and fits with standard BMW rear bearings, with an optional BMW Motorsport heavy-duty bearing also available for maximum endurance reliability.

Sold as a pair, this upgrade is ideal during drivetrain rebuilds, hub servicing or preventative maintenance on high-performance F8X builds.

Please note: this component is designed for motorsport use only and does not include a manufacturer warranty. Regular inspection is recommended during competitive use.

Further information below.

Key Features

BMW Motorsport Rear Flange Hub Upgrade
Genuine BMW Motorsport component
Originally developed for BMW M2 CS Racing
Originally developed for BMW M4 GT4
Designed to improve rear hub durability under motorsport loads
Reinforced flange design helps prevent hubcentric stress cracking
Thicker full-face hubcentric mounting surface
Distributes load more effectively than the lightweight OE design
Motorsport-grade forged and heat-treated steel construction
Maintains OEM geometry and fitment
Direct OEM replacement
Fits with standard BMW rear bearings
Compatible with optional BMW Motorsport heavy-duty bearing
Direct bolt-on installation
No modification required
Ideal for endurance, sprint and time-attack builds
Suitable preventative upgrade during drivetrain rebuilds or rear hub service
Sold as a pair
Designed for motorsport use only
No manufacturer warranty
Regular inspection recommended during competitive use

Vehicle Compatibility

BMW F87 M2 Competition
BMW F87 M2 CS
BMW F80 M3
BMW F82 M4
BMW F83 M4 Convertible
BMW M2 CS Racing
BMW M4 GT4
Designed for compatible BMW F8X M and BMW Motorsport applications requiring improved rear hub flange strength and reliability.
Compatible with standard BMW rear bearings.
Compatible with optional BMW Motorsport heavy-duty rear bearing upgrade.
Please confirm vehicle model, rear hub setup, bearing choice, intended use and motorsport inspection requirements before ordering.

What's Included

Pair of BMW Motorsport rear flange hubs
Left and right rear hub flange upgrade
Forged and heat-treated steel construction
Full-face hubcentric mounting surface
Direct OEM replacement design
Standard BMW rear bearings are not included unless supplied separately
BMW Motorsport heavy-duty bearings are not included unless supplied separately

FAQs

What does the BMW Motorsport Rear Flange Hub Upgrade do?

It replaces the standard rear hub flange with a reinforced BMW Motorsport version designed to improve strength and reliability under high-load motorsport use.

Why upgrade the rear hub flanges?

The standard lightweight OE hub design can develop stress cracks around the outer hubcentric surface during endurance or high-load track use. The Motorsport flange uses a thicker full-face hubcentric design to reduce stress concentration.

Is this a genuine BMW Motorsport part?

Yes. This is a genuine BMW Motorsport component.

Which cars was it developed for?

It was originally developed for the BMW M2 CS Racing and BMW M4 GT4.

Which road cars is it compatible with?

It is compatible with BMW F87 M2 Competition, F87 M2 CS, F80 M3, F82 M4 and F83 M4 models.

What is the hub flange made from?

It is made from motorsport-grade forged and heat-treated steel.

Does it fit with standard BMW rear bearings?

Yes. It fits with standard BMW rear bearings.

Can it be used with BMW Motorsport heavy-duty bearings?

Yes. It is compatible with the optional BMW Motorsport heavy-duty rear bearing upgrade.

Is modification required?

No. It is a direct bolt-on replacement with no modification required.

Are these sold individually or as a pair?

They are sold as a pair.

Is this suitable for endurance racing?

Yes. It is designed for endurance, sprint, time attack and high-performance motorsport use.

Does it come with a warranty?

No. This is a motorsport-use component and does not come with a manufacturer warranty.

What should I check before ordering?

Please confirm vehicle model, rear hub setup, bearing choice, intended use and any motorsport inspection requirements before ordering.

Shipping & Delivery

Dispatch Times

Most stocked items dispatch within 1–2 business days. Some products may have longer lead times due to special ordering, availability, or build times. If your order contains multiple items, they may be shipped together once all items are ready unless otherwise agreed.

UK & International Shipping

We ship worldwide. Transit times vary depending on destination and courier. Tracking details are provided once your order is dispatched.

Import Duties & International Orders

International customers are responsible for all import duties, taxes, and clearance fees. These are not included in our prices and are outside of our control. Refusal or non-payment of import charges may result in return shipping, handling fees, and customs charges being deducted from any refund.

Damaged Shipments

If your parcel arrives visibly damaged, please refuse delivery or note the damage with the courier. If damage is discovered after opening, contact us immediately with photos. Do not install damaged items, as installation voids courier claims and return eligibility.

Returns

Returns must be authorised before sending anything back. Returns must be requested within 14 days of delivery and returned within 14 days of approval, in unused/uninstalled condition and in original packaging. Some items, including special-order, built-to-order, used, installed, or modified parts, are non-returnable.

Full details are available in our Shipping Policy and Returns & Refund Policy.

Warranty & Disclaimer

Warranty

Most products include a manufacturer’s warranty covering manufacturing defects only. Warranties do not cover wear and tear, improper installation, misuse or neglect, track use, competition or racing environments, labour costs, vehicle damage, downtime, or consequential loss. Warranty outcomes are determined by the manufacturer, not Clubsport Garage. Items must be returned for inspection at the customer’s cost unless agreed otherwise.

Fitment & Installation

Many products are aftermarket components and may require professional installation or minor adjustment. Perfect OEM-level fitment cannot be guaranteed. Professional installation by an experienced workshop is strongly recommended. Installed or used items cannot be returned.

Motorsport Use Disclaimer

Some products are intended for off-road, track, or motorsport use only and may not be legal for road use, for example non-TÜV/DOT-approved parts. It is the customer’s responsibility to ensure compliance with local laws, insurance requirements, and vehicle regulations. By purchasing and installing aftermarket parts, you accept all responsibility for ensuring compatibility, legal compliance, proper installation, and any resulting wear, damage, or failure.

Product Images & Descriptions

Product photos are illustrative and may differ slightly from the item supplied. If specific details are important, please contact us before purchasing.

Full details are available in our Terms of Service and related policy pages.