- Description
- Fitment
- Refund Policy
The G8x M3/M4 excels in nearly every aspect compared to its precursor, but the prevailing concern among enthusiasts lies in its sound quality. Similar to its predecessor, the S55 in the F8x, the S58 in the current generation still leaves room for improvement. While the stock sounds are a step up from the previous generation, they still have an excess of raspiness that fails to convey the refined aggression inherent to the brand's signature performance models. MAD remedies this shortcoming with a valved axle back exhaust system that delivers a deeper, more impactful note, and adds a level of amplification beyond the stock version. When paired with the optional single midpipe, it yields an even louder, smoother, and fuller sound.
To achieve the desired sound volume and tone befitting the G8x M3/M4, we increased the tubing size to 76mm (from the stock's 70mm), which reduces backpressure and allows a freer flow throughout the system. The larger piping diverges into multiple paths as it approaches the vehicle's rear, the choice of which is determined by the factory exhaust valves that are retained.
When the valves are closed, flow is directed into the MAD muffler, and exits through the two inner tips. This restricts noise during low-speed driving and produces a more subdued yet deeper sound. When the valves are open during high-load conditions, most gases bypass the muffler entirely for a near-straight pipe design, achieving maximum aural enjoyment. This harmonious balance satisfies a range of tastes and offers civility or passionate aggression as the situation demands. MAD has determined this combination to be appropriate for the brand's signature performance models that cater to discerning enthusiasts who want the best in all scenarios.
Visually, MAD's G8x M3/M4 exhaust is meticulously constructed entirely from T304 stainless steel and TIG welded for superior visual appeal and color. The entire system is brush finished for a perfect look straight out of the box. The attention to detail isn't limited to the unseen parts once the exhaust is installed; it extends to the exhaust tips as well. MAD's exhaust includes substantial quad 4.5-inch (114mm) clamp-on exhaust tips. Despite their large size on paper, the tips seamlessly integrate and fill the factory cut-outs, achieving the OEM+ look with an added touch of audible attitude.
Features:
- Connects to Factory Midpipe (Cutting required) or MAD Single Midpipe (No Cutting required)
- Maximum gains of +5 HP and +5 lb-ft of torque
- Pleasingly louder, sportier sound
- Drone abatement technologies reduce cabin resonance
- 4.5-inch (114mm) tips
- Larger diameter piping for increased flow (76mm vs. 70mm)
- 7-pounds lighter than the stock axle back (Stock: 44-pounds vs. MAD: 37-pounds)
- Reuses stock exhaust valve actuators, and the operation of exhaust valve is unchanged so the exhaust tone can be adjusted via the M-drive settings
- Includes extended valve harness
- Computer-controlled exhaust valves are retained and limit noise during low-speed driving, and open fully during high-load conditions
- 100% 304 Stainless Steel construction
- Factory-like fitment with included mounting hardware
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.
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.
Note:
* Customer must pay for the shipping to the original manufacturer.
Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases.
Additional non-returnable items:
* Gift cards
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)
* Book with obvious signs of use
* Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
* Any item that is returned more than 14 days after delivery
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.
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
Exchanges
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at amtuning.ca@outlook.com labelled as “Defective Item”
Gifts
If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.
If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.
Shipping
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 return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.
