- Description
- Fitment
- Refund Policy
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
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Labor Fees (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
