Description
Upgrade the exhaust flow and sound of your S58-powered BMW X3M or X4M with the MAD 3.5-Inch Single Resonated Midpipe, designed specifically for the F97 X3M and F98 X4M.
The MAD 3.5-inch Resonated Single Midpipe replaces the factory center section with a larger, high-flow 3.5-inch single-pipe configuration and integrated resonator. The design eliminates the restrictive OEM secondary catalytic converters and factory resonator, providing a more direct exhaust path while maintaining a refined exhaust character.
The larger single-pipe design is engineered to improve exhaust flow and produce a deeper, louder, and more aggressive exhaust note compared with the factory system. Unlike a completely unresonated midpipe, the integrated resonator helps control unwanted frequencies and reduce excessive rasp, making this setup a strong choice for enthusiasts who want a more noticeable exhaust sound without making the vehicle unnecessarily harsh or unpleasant during everyday driving.
The MAD resonated midpipe can be used with factory or aftermarket downpipes and is designed to work with the OEM exhaust or compatible aftermarket axle-back systems. This makes it a versatile upgrade for both lightly modified and extensively upgraded S58-powered X3M and X4M builds.
With its direct-fit design and vehicle-specific configuration, the MAD 3.5-inch Single Resonated Midpipe provides an effective way to enhance the sound and exhaust flow of the S58 platform while maintaining a more controlled tone for street and highway use.
Key Features
- 3.5-inch single midpipe design
- Designed specifically for the BMW S58 engine
- Removes the OEM secondary catalytic converters
- Removes the OEM factory resonator
- Integrated resonator helps reduce excessive rasp
- Improves exhaust flow compared with the factory midpipe
- Produces a deeper and more aggressive exhaust tone
- Louder exhaust character while maintaining controlled sound quality
- Designed for improved street and highway drivability
- Compatible with factory or aftermarket downpipes
- Works with the OEM exhaust or compatible aftermarket axle-back systems
- Direct-fit design for BMW X3M and X4M applications
- No major modifications to the vehicle's exhaust system required
Exhaust Sound & Performance
The MAD 3.5-inch Single Resonated Midpipe is designed for drivers who want to make their S58-powered X3M or X4M louder and deeper without the excessive rasp that can occur with fully unresonated midpipe configurations.
By replacing the OEM center section with a larger single pipe and integrated resonator, the system provides a freer-flowing exhaust path while the resonator helps refine the resulting sound. The result is a more pronounced exhaust note with a deeper, more aggressive character that remains better controlled during normal driving and highway cruising.
Fitment
- 2019–2024 BMW X3M (F97)
- 2019–2025 BMW X4M (F98)
Engine: BMW S58 3.0L Twin-Turbocharged Inline-6
Chassis: F97 / F98
Configuration: 3.5-inch Single Resonated Midpipe
