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MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
  • MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
  • MMX Performance Underbody Chassis Brace installed on a BMW F8X M2, M2 Competition, M3, or M4, providing an additional 15mm of exhaust clearance while maintaining factory ground clearance and increasing chassis rigidity.
  • MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
  • MMX Performance Underbody Chassis Brace installed on a BMW F8X M2, M2 Competition, M3, or M4, providing an additional 15mm of exhaust clearance while maintaining factory ground clearance and increasing chassis rigidity.
  • MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
  • MMX Performance Underbody Chassis Brace installed on a BMW F8X M2, M2 Competition, M3, or M4, providing an additional 15mm of exhaust clearance while maintaining factory ground clearance and increasing chassis rigidity.
  • MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
  • MMX Performance Underbody Chassis Brace installed on a BMW F8X M2, M2 Competition, M3, or M4, providing an additional 15mm of exhaust clearance while maintaining factory ground clearance and increasing chassis rigidity.
  • MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
  • MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
  • MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
  • MMX Performance BMW F8X Underbody Chassis Brace on a white background, precision CNC machined from billet 6061-T6 aluminum to increase exhaust clearance, improve chassis rigidity, and provide a direct OEM-fit installation for the F87 M2, M2 Competition, F80 M3, and F82/F83 M4.
MMX Performance BMW F8X M2 / M3 / M4 Underbody Chassis Brace

MMX Performance BMW F8X M2 / M3 / M4 Underbody Chassis Brace

SKU: MMR13-1000
$295.00

AVAILABLE TO ORDER

Designed & Engineered in the UK
Developed for precise fitment on supported vehicles.
Includes all required hardware for complete installation.
Precision CNC-machined from high-strength aluminum for exceptional strength and durability.
Track-tested and validated in motorsport conditions.
Direct OEM replacement for factory components.

The MMX Performance Underbody Chassis Brace is a precision-engineered replacement for the factory underbody brace found on the BMW F87 M2, F87 M2 Competition, F80 M3, and F82/F83 M4. Developed for vehicles equipped with larger-diameter aftermarket exhaust systems, the brace provides an additional 15mm of exhaust clearance while maintaining the vehicle's original ground clearance.

Precision CNC machined from billet 6061-T6 aluminum, the MMX brace combines exceptional strength with reduced weight. Its optimized profile removes unnecessary material while preserving the rigidity required to reinforce a key structural section of the chassis, improving overall stability and dynamic response during both spirited road driving and track use.

Unlike the factory stamped steel component, the billet aluminum construction delivers increased chassis rigidity while creating additional clearance beneath the vehicle. This reduces the likelihood of exhaust contact without compromising ride height or requiring permanent modifications.

Designed as a direct replacement, the MMX Underbody Chassis Brace installs using the original factory mounting points with no cutting, drilling, or fabrication required. The installation is fully reversible, making it an ideal upgrade for both modified and OEM-plus F8X builds.

Designed and tested in the United Kingdom, the MMX Underbody Chassis Brace reflects the brand's commitment to precision engineering, premium manufacturing, and performance-focused product development.

Product Details

  • Provides an additional 15mm of exhaust clearance over the factory brace
  • Maintains factory ground clearance
  • Increases chassis rigidity for improved vehicle dynamics
  • Precision CNC machined from billet 6061-T6 aluminum
  • Optimized lightweight design without sacrificing strength
  • Ideal for vehicles equipped with larger-diameter aftermarket exhaust systems
  • Direct replacement for the factory underbody brace
  • Uses original factory mounting points
  • No cutting, drilling, or permanent modifications required
  • Fully reversible installation
Additional Exhaust Clearance +15mm Creates additional space for larger-diameter aftermarket exhaust systems without reducing factory ground clearance.
Premium Construction Billet 6061-T6 Aluminum Precision CNC machined from aerospace-grade aluminum for exceptional strength, rigidity, and reduced weight.
Installation Direct Bolt-On Fitment Uses the factory mounting points with no cutting, drilling, or permanent modifications required.
MMX Performance Underbody Chassis Brace installed on a BMW F87 M2, M2 Competition, F80 M3, or F82/F83 M4, providing an additional 15mm of exhaust clearance, improved chassis rigidity, and a direct OEM-fit installation for aftermarket exhaust systems.

More Room. More Rigidity.

The MMX Underbody Chassis Brace is engineered for the BMW F8X platform to provide 15mm of additional exhaust clearance without sacrificing factory ride height. CNC machined from billet 6061-T6 aluminum, it reinforces the chassis while accommodating larger-diameter performance exhaust systems with a direct OEM-fit installation.

Precision Engineering From Every Angle

Every detail of the MMX Underbody Chassis Brace was engineered to improve both functionality and durability. From its optimized billet construction to its direct-fit installation, each feature contributes to a stronger, more capable chassis component.

MMX Performance BMW G8X M3 and M4 underbody chassis brace installed, showing the additional 15mm of exhaust clearance beneath the vehicle while maintaining factory ground clearance for improved aftermarket exhaust fitment.

15mm Additional Exhaust Clearance

Designed specifically to create extra space for larger-diameter aftermarket exhaust systems without reducing ground clearance.
Close-up of the MMX Performance BMW G8X M3 and M4 Underbody Chassis Brace on a white background, highlighting the precision CNC machining, billet 6061-T6 aluminum construction, and premium engineering details.

Billet 6061-T6 Construction

Precision CNC machined from aerospace-grade aluminum for exceptional strength, reduced weight, and a premium finish.
CNC machining process used in the development of MMX Performance products, showcasing UK design, engineering, and precision manufacturing standards

UK Designed & Engineered

Developed by the MMX engineering team in the United Kingdom, drawing on more than a decade of experience refining BMW performance products.
MMX Performance BMW G8X M3 and M4 Underbody Chassis Brace installed, showcasing the OEM fitment, factory mounting points, and precision billet 6061-T6 aluminum construction for a direct bolt-on installation.

OEM Fitment

Installs using the factory mounting points with no cutting, drilling, or permanent modifications required.

Newsroom

MMX Performance underbody chassis brace lineup on a white background, featuring billet 6061-T6 aluminum chassis braces for the BMW F8X M2/M3/M4, G87 M2, and G8X M3/M4 platforms, engineered to increase exhaust clearance, improve chassis rigidity, and provide direct OEM-fit installation.

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