Product Details
About this part
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Introducing the MAD S58 Catted Downpipe
The perfect upgrade for BMW enthusiasts looking to unlock more performance and a deeper, more aggressive exhaust note without triggering a check engine light.
Crafted from high-quality 304 stainless steel, this downpipe is built to handle extreme heat and harsh driving conditions. The smooth piping transitions are designed for maximum exhaust flow, delivering noticeable gains in horsepower, torque, and throttle response.
Equipped with 300 cell high-flow catalytic converters, the MAD S58 Catted Downpipe improves engine sound and overall drivability while keeping the check engine light off. It bolts directly to the factory exhaust system with no cutting or welding required, making installation quick and hassle-free. Itโs also fully compatible with most aftermarket exhaust systems, giving you the freedom to customize your build.
No CEL guarantee
If you get a check engine light related to the catalytic converter, MAD will replace the downpipe for free.
Donโt settle for stock performance. Upgrade to the MAD S58 300 Cell Race Catted Downpipes and experience the full potential of your BMW.
Race use only
Features
- 300 CEL catalytic converters
- No check engine light guarantee
- Compatible with right-hand drive and left-hand drive vehicles
- Smooth bends for maximum airflow without drone
- Up to 30HP increase on stock turbos, even more with upgraded setups
- Lifetime warranty on defects and fitment
- 90-day return period
- Ships in 1 to 2 business days
- Spot-on fitment
- Flex section for added durability
Fitment
- 2021 and up BMW M3 G80
- 2021 and up BMW M4 G82 and G83
- 2023 and up BMW M2 G87
Disclaimer
For race use only. This product is not certified for use on public roads and may not comply with local regulations. Always check your local laws before installing.
Fitment
Not sure it fits? Contact us with your car's year, model and VIN and we'll help you confirm before you order.
If a part doesn't fit as expected, contact us and we'll work with you to resolve it.
Majority of products have a fitment section in the product description or within the title.
Returns
- Unused, uninstalled parts can be returned or exchanged within 30 days of the order date.
- To start a return: Contact us first, don't use Return to Sender.
- Returns can have up to a 20% restocking fee.
- Built-to-order and special-order items can't be returned or cancelled once production begins.
Shipping
- Orders are processed 7 days a week to ensure your product ships as quickly as possible.
- Inspect parts within 10 days of delivery, and reach out regarding any damage or missing pieces.
See our Tariff Policy
Warranty
- All parts retain the manufacturer's warranty.
- Warranty claims are subject to the manufacturer's approval.