- Description
- Fitment
- Refund Policy
Enhance your BMW's performance with the MAD BMW B58 Gen 3 Catless Downpipe, specifically engineered for the 2025+ BMW M340. Crafted from premium 304 stainless steel, this 4.5-inch downpipe guarantees optimal exhaust flow, durability, and resistance to corrosion, providing the absolute best quality and longevity.
By eliminating restrictive factory catalytic converters, the MAD catless downpipe significantly boosts horsepower, sharpens throttle response, and reduces turbo lag, delivering an exhilarating driving experience. Precision-engineered welds and exact fitment ensure a seamless, bolt-on installation without hassles or modifications.
Enjoy an aggressive, sporty exhaust note and unparalleled performance gains. The MAD downpipe is a must-have upgrade for both daily-driven enthusiasts and track-focused drivers seeking to unlock their BMW’s full potential.
Features:
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High-grade 304 stainless steel for unmatched quality and durability
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4.5-inch piping diameter for improved exhaust flow and performance
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Significant boost in horsepower and torque
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Enhanced throttle response and reduced turbo lag
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Aggressive, deep, and sporty exhaust tone
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Easy direct bolt-on installation
Upgrade to MAD quality—experience superior performance, unmatched reliability, and thrilling sound for your 2025+ BMW M340.
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
