MAD BMW X3M X4M 3.5" Resonated Single Midpipe
The MAD 3.5" Resonated Single Midpipe is a simple way to open up the exhaust on the S58-powered X3M and X4M while changing the factory exhaust tone. This midpipe replaces the OEM center section, removing the secondary catalytic converters and factory resonator and replacing them with a larger 3.5" single pipe and integrated resonator.
The larger single-pipe design improves exhaust flow and gives the vehicle a deeper, louder exhaust note without the excessive rasp commonly associated with completely unresonated midpipes.
The integrated resonator helps clean up the exhaust tone and keeps the sound more controlled during normal driving and highway cruising. It's a good option for customers who want more sound from their X3M/X4M without going to an overly aggressive or raspy setup.
Features
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3.5" single midpipe
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Removes the OEM secondary catalytic converters
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Removes the OEM factory resonator
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Integrated resonator to help reduce rasp
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Deeper and more aggressive exhaust tone
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Increased exhaust flow compared to the factory midpipe
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Designed to work with the factory exhaust or aftermarket axle-back systems
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Compatible with factory or aftermarket downpipes
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Direct-fit design for the S58 X3M and X4M
Fitment
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2019–2024 BMW X3M (F97)
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2019–2025 BMW X4M (F98)
1 Review Hide Reviews Show Reviews
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Midpipe
The midpipe was shipped out of Vegas and received in Florida in about 4-days. Well packaged and very well made. The welds were perfect. Installation was straightforward and took me (and 80-year-old man)about 44 hours. You don't have to be super accurate since the assembly leaves quite a bit of adjustment. Bolted up tight and leak-free first time. Sounds growly from outside, muted and rumbly from inside. Would highly recommend.