- Description
- Fitment
- Refund Policy
Unlock the true sound and performance of your BMW F9X M5 or M8 with the MAD Catted Downpipes, now with a No CEL Guarantee.
Upgrade your restrictive stock downpipes to the MAD high-flow catted design and experience significant improvements in exhaust flow, turbo spool, and throttle response. Built from premium 304 stainless steel, these downpipes are engineered to handle extreme heat and deliver long-lasting durability.
With 300 cell high-flow catalytic converters, you get the perfect balance of performance and drivability. Expect a deeper, more aggressive exhaust note with quicker turbo response, all while avoiding check engine lights. If a CEL does occur due to the catalytic converter, MAD will replace the downpipes for free.
These downpipes are designed as a direct bolt-on upgrade with spot-on fitment, no cutting or welding required. They work seamlessly with the stock exhaust system as well as aftermarket setups.
No CEL guarantee
If you get a check engine light related to the catalytic converter, MAD will replace the downpipe for free.
Don’t settle for stock performance. Upgrade to the MAD 300 Cell Race Catted Downpipes and experience the full potential of your BMW.
Warranty coverage
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The "No CEL" guarantee is valid for only one year from the date of purchase.
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The lifetime warranty still applies in cases of manufacturer defects, such as cracks in the pipe or welds.
Race use only
Features
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300 CEL catalytic converters
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No check engine light guarantee
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Compatible with right-hand drive and left-hand drive vehicles
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Smooth bends for maximum airflow without drone
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Up to 30HP increase on stock turbos, even more with upgraded setups
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Spot-on fitment
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Flex section for added durability
Fitment:
2018+ BMW F90 M5 (incl. Competition)
2018+ BMW F91/F92/F93 M8 (Coupe, Convertible, Gran Coupe)
SKU: MAD-122
Disclaimer:
For off-road or racing use only. Please check your local laws and regulations before 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.
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 or electronic tuning components.
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.
