Upgrade from the stock B58 downpipe to the MAD B58 catless downpipe for maximum airflow, power, and sound!
The Mad Catless B58 Downpipe is an essential upgrade for any BMW enthusiast looking to maximize the performance of their B58 engine. Made from high-quality materials, this downpipe is designed to provide maximum exhaust flow and improve turbo spool time, resulting in increased horsepower and torque.
The Mad Catless B58 Downpipe is constructed from High quality 304 stainless steel, which provides excellent durability and resistance to corrosion. The catless design eliminates the restrictive catalytic converter, allowing for maximum exhaust flow and reducing backpressure. This results in a noticeable increase in power and throttle response, as well as a more aggressive exhaust note.
The Mad Catless B58 Downpipe is designed to be a direct bolt-on replacement for the factory downpipe, making installation quick and easy. The downpipe is also designed to work seamlessly with the factory exhaust system, so there's no need to worry about compatibility issues.
Overall, the Mad Catless B58 Downpipe is a must-have upgrade for any BMW B58 engine owner who wants to improve performance and unleash the full potential of their car.
Features:
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Compatible with right-hand drive and left-hand drive vehicles
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Smooth bends for maximum airflow without any drone
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Up to 30HP increase on the stock turbos, even more on upgraded turbos
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Lifetime warranty on defects and fitment
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All orders ship in 1-2 business days
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Spot on fitment
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Flex section
NOTE: Downpipe gasket is not included. Part #18328612538 is required for installation.
Fitment:
NOTE: Does not fit Euro-spec B58 vehicles with OPF
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2015+ BMW M240i & Xdrive
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2016-2019 BMW 340i & Xdrive
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2020+2024 BMW M340i & Xdrive * Does not fit 2025 *
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2016+ BMW 440i & Xdrive
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2016+ BMW 540i & Xdrive
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2016-2020 640 GT & X drive G32
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2016+ BMW 740i & Xdrive
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2017-2024 X3 M40 G01/G02
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2017-2024 X4 M40 G01/G02
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2019-2022 G05 BMW X5 40i & xDrive Non LCI only
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2018-2022 G06 X6 40I & x drive Non LCI only
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2019-2022 G07 BMW X7 40i & xDrive Non LCI only
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2019+ G29 BMW Z4 M40i
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2019+ Toyota Supra 3.0L
Emissions Disclaimer:
This product is not legal for sale or use on pollution-controlled vehicles operated on public roads, highways, or streets. It is intended for off-road, race, or closed-course competition use only, where such modifications are permitted.
By purchasing this product, you acknowledge and agree that:
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You are responsible for compliance with all applicable emissions laws and regulations.
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MAD and its affiliates disclaim any liability for improper or unlawful use of this product.
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Use of this part on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws.
Please check your local laws before purchase and installation.
