MMX BMW G8X High Capacity Baffled Differential Sump/Oil Pan For G80/G81 M3, G82/G83 M4 & G87 M2

The MMX Performance High Capacity Baffled Differential Sump for the BMW G8X platform has been engineered for drivers who demand consistent drivetrain performance under sustained high-load conditions. Designed for both RWD and xDrive variants of the G80/G81 M3, G82/G83 M4 and G87 M2, this precision-machined upgrade enhances lubrication, cooling and long-term differential reliability.

Increased Oil Capacity for Sustained Performance

This high-capacity sump increases differential oil volume by up to 2 litres (2.10 quarts), providing a larger reserve to maintain optimal lubrication during aggressive driving and extended track sessions. The additional fluid capacity supports more stable operating temperatures and reduces the risk of oil starvation under lateral load.

An integrated internal windage tray ensures constant lubrication of the gears and pinion, even during high cornering forces. By controlling oil movement within the housing, the design reduces component drag and helps minimise drivetrain losses, supporting efficient power delivery while protecting internal components.

Advanced Cooling & Temperature Management

Effective thermal management is critical in performance applications. The MMX differential sump incorporates both internal and external cooling fins, increasing surface area to maximise heat dissipation. This design promotes consistent oil temperatures, helping to prevent overheating during demanding use on track or spirited road driving.

By maintaining stable temperatures and improved lubrication, the sump supports sustained differential performance and reduces the likelihood of drivetrain-related warnings such as “Rear Axle Differential Lock: Driving Stability Limited.” This allows for more uninterrupted time on track and greater driving confidence.

Precision Billet Construction & OE Fitment

Manufactured from 6061-T6 billet aluminium, the sump achieves an optimal balance of strength and lightweight construction. Every surface is precision machined to ensure durability and accurate fitment, delivering a premium upgrade that integrates seamlessly with the factory mounting points for a true OE-style installation.

An additional -8AN port is included, along with an M22 to -8AN adaptor, allowing integration of external cooling systems for further thermal management where required.

The sump is also fully compatible with the MMX Dual Differential Mount (MMR55-1606), requiring no additional hardware for integration. Owners can run the sump independently, the dual mount independently, or combine both for a comprehensive drivetrain upgrade.

Key Features

• Increases oil capacity by up to 2 litres (2.10 quarts)

• Integrated internal windage tray for constant gear and pinion lubrication

• Reduces component drag and drivetrain losses

• Internal and external cooling fins for improved heat dissipation

• Precision machined from 6061-T6 billet aluminium

• Additional -8AN port with M22 to -8AN adaptor included

• Direct OE-style fitment to factory mounting points

• Compatible with MMX Dual Differential Mount (MMR55-1606)

• Suitable for RWD and xDrive G8X models

• Helps prevent differential temperature-related stability warnings

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 upgrades specifically for BMW M platforms, focusing on durability, efficiency and track-capable reliability. This high-capacity baffled differential sump is designed to protect critical drivetrain components while maintaining consistent performance under demanding conditions. For drivers seeking improved lubrication control, enhanced cooling and long-term differential stability, this is a purposeful and technically considered 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.

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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.

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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.