MMX BMW G8X Dual Differential Mount For G80/G81 M3, G82/G83 M4 & G87 M2

The MMX Performance Dual Differential Mount for the BMW G8X platform is engineered to reinforce one of the most critical load-bearing components of the drivetrain. Designed specifically for the G80/G81 M3, G82/G83 M4 and G87 M2, this precision-machined solution adds a second point of support to significantly improve differential stability under acceleration and dynamic driving conditions.

Increased Stability Under Load

The factory differential housing includes a secondary bush mounting location that remains unused in standard configuration. The MMX Dual Differential Mount utilises this mounting point to introduce additional structural support, reducing unwanted differential movement under high-load acceleration, rapid gear changes and aggressive cornering.

By increasing rigidity at the rear differential, the mount sharpens driveline response and improves power transfer consistency. The result is a more direct and controlled feel under load, with enhanced traction and improved feedback through the chassis.

True OEM-Fit Installation

The MMX mount is designed for seamless OEM-style fitment with no modification required. It bolts directly to the factory differential while retaining the original sump, meaning:

• No fluid draining is required

• No removal or replacement of the OEM differential sump

• Fully reversible installation

This makes it an ideal upgrade for owners who want enhanced drivetrain stability without permanent alteration to the vehicle.

The mount is compatible with the OEM rubber secondary bush (BMW part number 33 31 6 899 168), as well as polyurethane or solid aftermarket bushes, offering flexibility depending on build preference.

Reduced Movement, Improved Reliability

Excess differential movement under load can contribute to premature wear and issues such as diff and CV seal weeping. By limiting unnecessary movement, the MMX Dual Differential Mount helps maintain seal integrity and improve long-term drivetrain reliability.

Whether used for track days, spirited road driving or tuned applications, this upgrade supports improved tyre traction, sharper response and more consistent vehicle dynamics.

Key Features

• Utilises factory secondary bush mounting hole for added stability

• Adds a second support point to reduce differential movement

• OEM-fit installation with no modification required

• Retains factory differential sump (no fluid changes needed)

• Compatible with OEM rubber bush (33 31 6 899 168), polyurethane or solid bushes

• Helps reduce diff and CV seal weeping under hard acceleration

• Improves traction and drivetrain response

• CNC machined from 6061-T6 billet aluminium for strength and low weight

• Supplied with all required installation hardware

• Secondary bush not included

Compatibility

• BMW G80 M3

• BMW G81 M3 Touring

• BMW G82 M4 Coupe

• BMW G83 M4 Convertible

• BMW G87 M2

Why Choose MMX for Your G8X Drivetrain?

MMX Performance develops precision-engineered BMW M upgrades focused on durability, stability and real-world performance. The G8X Dual Differential Mount strengthens a key drivetrain mounting point while maintaining factory-level integration and reversibility. For drivers seeking sharper response, improved traction and enhanced drivetrain control, this is a technically refined and purposeful upgrade.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.