MMX Performance underbody chassis Brace - BMW / G8X / M3 / M4
Shipping & Returns
Shipping & Returns
How is shipping calculated?
Shipping cost is based on weight and size. Just add products to your cart and use the shipping estimate tool before checkout to see an accurate shipping cost to your address!
What is your return policy?
We do accept returns. Please email us at info@broxtuning.ca to submit your request. Items sent to us without submitting a request will not be accepted.
We have a 14-day return policy, which means you have 14 days after receiving your item to request a return. Customer service is at the top of our values here at Brox Tuning and we try our best to make the return process painless for our customers. If you need more info please click here for our detailed return policy.
When will my order ship?
Once an order is placed, if the item is in stock we will have it shipped out within 1 business day. Out of stock items usually ship within 1-2 weeks. Please email us if you have any questions regarding inventory at sales@broxtuning.ca.
Do you ship worldwide?
We only ship to Canada & USA.
Price Match
Price Match
If you're shopping for parts and want to make sure you get the best price before you order, give Brox Tuning the opportunity to earn your business. Call us at (416) 798-BROX or email us at sales@broxtuning.ca with the required info below:
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Local Pick Up
Local Pick Up
If you are local to our physical location you have the ability to choose the "local pick up" option at checkout! This means you can come and get your items once they are available for pick up avoiding shipping costs. In stock items are usually ready within 1-3 hours. Out of stock items will need 1-2 weeks. Get in touch with us if you have questions about stock levels at sales@broxtuning.ca or call us at (416) 798-BROX
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Description
Description
The MMX Performance Underbody Chassis Brace is a precision-engineered replacement for the factory underbody brace found on the BMW G8X M3 and M4. Developed for vehicles running 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 street and track driving.
Unlike the factory stamped component, the billet aluminum construction delivers increased structural rigidity while creating additional clearance beneath the vehicle. This helps reduce the possibility of exhaust contact without compromising ride height or requiring permanent vehicle 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 G8X builds.
Designed and tested in the United Kingdom, the MMX Underbody Chassis Brace reflects the brand's commitment to precision manufacturing, functional engineering, and performance-driven 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 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
Creates additional space for larger-diameter aftermarket exhaust systems without reducing factory ground clearance.
Precision CNC machined from aerospace-grade aluminum for exceptional strength, rigidity, and reduced weight.
Uses the factory mounting points with no cutting, drilling, or permanent modifications required.
Payment & Security
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