- Description
- Fitment
- Refund Policy
The MAD BMW M340 / M440 Axle Back Exhaust System is designed to deliver a bold sound upgrade without unnecessary parts or added cost. Unlike our previous full catback design, this updated version is more cost-effective, easier to install, and focuses only on the section of the exhaust that actually changes sound and driving experience.
On the M340i and M440i platform, a full catback simply is not needed. The factory midpipe is already a straight-through, non-restrictive design with no cats or resonators, meaning there is little to no performance or sound benefit from replacing it.
This axle back system provides a deeper, more aggressive tone under throttle while remaining refined and comfortable during normal driving. It also upgrades the factory single-valve setup into a true dual M-style valve configuration using the OEM valve motor along with an additional included valve and harness. The exhaust continues to function perfectly with OEM drive modes, staying quiet in Comfort and fully opening in Sport.
Installation is quick and straightforward using OEM BMW designated cut points, allowing the car to easily be returned to stock later using OEM BMW sleeve clamps. Part #'s 18307560781 & 18307560780
Constructed from premium 304L stainless steel, the system is available with (101 mm) 4 inch brushed stainless, black, or carbon tips.
Features:
-
More cost-effective and easier to install than our previous catback system
-
Aggressive sound improvement while retaining the factory midpipe
-
True dual M-style valve setup with included valve motor and harness
-
Retains OEM drive mode functionality
-
Premium 304L stainless steel construction
-
Larger diameter piping for increased flow (76mm vs 70mm)
-
Choice of brushed stainless, black, or carbon tips (101 mm)
-
Cut-and-clamp installation using OEM BMW cut points
-
Easy return to stock if needed
Fitment Includes:
-
BMW M340i G20 2018+
-
BMW M440i G22 Coupe 2018+
-
BMW M440i G26 Gran Coupe 2021+
-
BMW M340i / M440i 2025+
-
Compatible with RWD and xDrive models
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.
Customers also bought
$129.99
$149.99
$91.79
$107.99