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MMX Performance Differential Upgrades – BMW G8X M2 / M3 / M4

6th Feb 2026

MMX Performance G8X M2 / M3 / M4 High-Capacity Baffled Differential Sump / Oil Pan

Order link:

https://x-ph.com/mmx-performance-g8x-m2-m3-m4-high-capacity-baffled-differential-sump-oil-pan/

The MMX Performance High-Capacity Baffled Differential Sump is a precision-engineered upgrade developed specifically for high-performance BMW M vehicles that see aggressive driving and track use. Designed to improve lubrication control, cooling efficiency, and long-term drivetrain reliability, this sump directly addresses the limitations of the factory differential housing under sustained high-G conditions.

By increasing oil capacity and controlling oil movement inside the differential, the MMX Performance sump delivers more consistent lubrication, reduced thermal stress, and improved drivetrain stability during hard cornering, acceleration, and extended track sessions.

Increased Oil Capacity, Cooling, and Lubrication Control

This MMX Performance differential sump increases total oil capacity by up to 2 litres (2.10 quarts), ensuring the differential remains properly lubricated even during prolonged high-load driving. The integrated CNC-machined billet windage tray continuously feeds oil to the gears and pinion while reducing internal drag and oil aeration.

Internal and external cooling fins significantly increase surface area, allowing faster heat dissipation and more stable differential temperatures on both road and track.

Precision CNC Construction and OE-Style Fitment

Manufactured from CNC-machined 6061-T6 billet aluminum, the MMX Performance sump offers exceptional strength, durability, and thermal efficiency without unnecessary weight. All sealing surfaces are precision-machined for a reliable, leak-free installation.

This is a direct OE-style replacement that installs using factory mounting points with no cutting, drilling, or modification required. The sump is fully compatible with the MMX Performance Dual Differential Mount (MMR55-1606) without the need for additional hardware.

Designed to Eliminate Common G8X Track Issues

Under extreme use, factory differential oil starvation can trigger drivetrain protection warnings. This MMX Performance sump helps prevent the “Rear Axle Differential Lock: Driving Stability Limited” warning by maintaining consistent oil supply and temperature control, allowing uninterrupted driving and track time.

External Cooling Ready

For higher-demand builds, the sump includes an additional -8AN port along with an M22 to -8AN adaptor, allowing straightforward integration of an external differential oil cooler.

Vehicle Fitment

This MMX Performance High-Capacity Baffled Differential Sump is compatible with the following BMW models:

  • BMW G87 M2 (2023–present)
  • BMW G80 M3 Sedan (2021–present)
  • BMW G81 M3 Touring (2023–present)
  • BMW G82 M4 Coupe (2021–present)
  • BMW G83 M4 Convertible (2021–present)

Drivetrain compatibility:

  • Rear-Wheel Drive (RWD)
  • xDrive All-Wheel Drive

What’s Included

  • MMX Performance CNC-machined high-capacity baffled differential sump
  • MMX Performance CNC-machined billet windage tray
  • Magnetic drain plug with seal
  • Fill plug with seal
  • M22 to -8AN adaptor for external oil cooler integration
  • Complete installation hardware

Key Features

  • Increases differential oil capacity by up to 2 litres (2.10 quarts)
  • Integrated billet windage tray for consistent lubrication
  • Reduces oil starvation under high-G cornering
  • Improves differential cooling and temperature stability
  • Internal and external cooling fins for maximum heat dissipation
  • CNC-machined from 6061-T6 billet aluminum
  • OE-style direct drop-in installation
  • Compatible with MMX Performance Dual Differential Mount MMR55-1606
  • Includes -8AN port for external cooling upgrades
  • Ideal for high-performance street and track use

Torque Specifications

  • Drain Plug: 45 Nm
  • Fill Plug: 45 Nm
  • Differential Cover Bolts: 6–8 ft-lbs

MMX Performance G8X M2 / M3 / M4 Dual Differential Mount - MMR55-1606

Order link:

https://x-ph.com/mmx-performance-g8x-m2-m3-m4-dual-differential-mount-mmr55-1606/

The MMX Performance Dual Differential Mount is a precision-engineered drivetrain upgrade designed to reinforce one of the most critical weak points in the BMW G8X platform. Developed specifically for the G87 M2, G80 and G81 M3, and G82 and G83 M4, this mount adds a second differential support point using the factory secondary bushing location to significantly improve stability under load.

By reducing unwanted differential movement during hard acceleration, aggressive driving, and track use, the MMX Performance Dual Differential Mount delivers sharper driveline response, improved traction, and increased driver confidence.

Improved Differential Stability and Driveline Control

From the factory, the G8X differential relies on a single primary mounting point. The MMX Performance Dual Differential Mount utilizes the unused factory secondary bush mounting hole to introduce an additional support point, increasing overall rigidity and reducing rotational movement of the differential.

This added control helps stabilize the drivetrain under high torque loads, improves tyre contact during acceleration, and enhances overall vehicle feedback without introducing harshness when paired with compliant bushings.

OEM-Style Installation and Reversible Design

The MMX Performance mount installs using factory mounting locations and hardware alignment, requiring no cutting, drilling, or modification. The factory differential sump is retained, and no fluid draining or refilling is required during installation.

The design is fully reversible, allowing the vehicle to be returned to stock condition at any time.

Bushing Compatibility and Long-Term Protection

The mount requires a differential bushing to complete installation and is compatible with a wide range of options, including OEM rubber, aftermarket polyurethane, and solid bushings.

By limiting excess differential movement, the MMX Performance Dual Differential Mount also helps reduce the likelihood of differential and CV seal weeping that can occur during sustained high-load driving.

Vehicle Fitment

This MMX Performance Dual Differential Mount MMR55-1606 is compatible with the following vehicles:

  • BMW G87 M2 (2023–present)
  • BMW G80 M3 Sedan (2021–present)
  • BMW G81 M3 Touring (2023–present)
  • BMW G82 M4 Coupe (2021–present)
  • BMW G83 M4 Convertible (2021–present)

Chassis codes:

  • G80
  • G81
  • G82
  • G83
  • G87

Key Features

  • Utilizes factory secondary differential bushing mounting point
  • Adds a second support point to reduce differential movement
  • Requires a differential bushing for installation
  • Compatible with OEM rubber bushing 33 31 6 899 168
  • Compatible with polyurethane or solid differential bushings
  • Direct OEM-style bolt-on installation
  • Retains factory differential sump with no fluid changes required
  • Helps reduce differential and CV seal weeping under load
  • Improves traction, stability, and driveline response
  • CNC-machined from 6061-T6 billet aluminum
  • Lightweight, strong, and corrosion-resistant construction
  • Fully reversible installation

MMX Performance G8X M2 / M3 / M4 Ultimate Differential Track Pack

Order link:

https://x-ph.com/mmx-performance-g8x-m2-m3-m4-ultimate-differential-track-pack/

The MMX Performance Ultimate Differential Track Pack is a comprehensive drivetrain reliability solution engineered for drivers who push their BMW G8X M2, M3, or M4 hard on track. Designed to address the most common failure points seen during extended high-load driving, this carefully assembled bundle strengthens lubrication control, differential stability, and thermal protection as a complete system.

Rather than upgrading a single component, the MMX Performance Track Pack reinforces the differential from multiple angles, ensuring consistent performance through hard braking zones, sustained high-G cornering, and long track sessions.

What’s Included in the MMX Performance Ultimate Differential Track Pack

High-Capacity Billet Differential Sump / Oil Pan

The MMX Performance High-Capacity Differential Sump is CNC-machined from 6061-T6 billet aluminum and increases oil capacity by up to 2 litres (2.10 quarts). An integrated billet windage tray ensures continuous lubrication under high lateral loads, while internal and external cooling fins improve heat dissipation and temperature stability.

This sump is designed to reduce oil starvation, stabilize differential temperatures, and help prevent “Driving Stability Limited” warnings during aggressive track use.

Product details:

  • Direct OE-style bolt-on fitment
  • No cutting, drilling, or modification required
  • Integrated windage tray for consistent lubrication
  • Internal and external cooling fins
  • Includes -8AN port for optional external oil cooler integration

Magnetic Differential Oil Drain Plug – M22x1.5

The included MMX Performance magnetic differential drain plug is designed to capture metallic particles circulating in the oil before they can cause accelerated wear. The large magnetic surface area helps maintain cleaner fluid, improving lubrication efficiency and long-term component protection.

Product details:

  • Lightweight T6061 aluminum construction
  • Anodized MMX Performance finish
  • Large surface area magnetic tip
  • M22x1.5 thread specification

Dual Differential Mount

The MMX Performance Dual Differential Mount adds a second support point to the factory differential using the OEM secondary mounting location. By significantly reducing unwanted differential movement under load, this mount improves drivetrain stability, traction, and alignment during aggressive acceleration and corner exit.

Product details:

  • Engineered for track-focused durability and rigidity
  • Reduces differential rotation under lateral and longitudinal loads
  • Improves driveline response and consistency
  • Direct OEM-style installation

Rear Differential Output Shaft Heat Shield Set

Extended track sessions and aftermarket exhaust systems dramatically increase radiant heat near the rear CV boots. The MMX Performance Rear Differential Output Shaft Heat Shield Set creates a protective thermal barrier that deflects exhaust heat away from sensitive drivetrain components, reducing heat soak and preventing premature CV boot degradation.

Product details:

  • Custom-shaped for the rear differential output shaft area
  • Protects CV boots from excessive exhaust heat
  • Designed for high-temperature track environments
  • Helps maintain long-term drivetrain reliability

Built for Serious Track Use

Each component in the MMX Performance Ultimate Differential Track Pack is selected to address proven G8X track weaknesses:

  • Prevents oil starvation during sustained high-G cornering
  • Reduces differential housing movement under load
  • Limits heat soak in critical drivetrain components
  • Enhances reliability during extended track sessions

By combining lubrication control, structural stability, and thermal protection, this kit delivers a balanced and durable solution for high-performance driving.

Vehicle Fitment

This MMX Performance Ultimate Differential Track Pack is compatible with the following vehicles:

  • BMW G87 M2 (2023–present)
  • BMW G80 M3 Sedan (2021–present)
  • BMW G81 M3 Touring (2023–present)
  • BMW G82 M4 Coupe (2021–present)
  • BMW G83 M4 Convertible (2021–present)

Drivetrain compatibility:

  • Rear-Wheel Drive (RWD)
  • xDrive All-Wheel Drive

Installation Notes

  • Designed as a complete bolt-on solution
  • Installation recommended alongside high-performance differential fluid
  • Proper torque specifications should be followed during installation
  • Ideal to install as a system for maximum reliability and performance