Description
The MAD BMW F & G Chassis 5" B58 Catted Downpipe is a high-performance exhaust upgrade designed to unlock additional power, improve exhaust flow, and enhance sound while maintaining reliability. Built for drivers who want significant performance gains without triggering a check engine light, this downpipe delivers an ideal balance of power, sound, and durability.
Constructed from premium 304 stainless steel, it is engineered to withstand extreme heat and demanding driving conditions. The optimized piping design reduces restriction, allowing the turbocharged B58 engine to breathe more freely for improved horsepower, torque, and throttle response.
Features
- 5" high-flow performance design
- 304 stainless steel construction for maximum durability
- 300-cell high-flow catalytic converter
- Smooth mandrel bends for optimized exhaust flow
- Increased horsepower and torque gains
- Sharper throttle response
- Enhanced exhaust sound without excessive drone
- Direct bolt-on installation
- Compatible with most aftermarket exhaust systems
- Flex section included for added durability
- Compatible with both right-hand drive and left-hand drive vehicles
Warranty & Guarantee
- No CEL (Check Engine Light) guarantee or replacement provided
- Guarantee valid for 2 years from date of purchase
- Lifetime warranty against manufacturing defects (including cracks or weld failures)
- Ships within 1 to 2 business days
Installation Notes
- Direct bolt-on fitment, no cutting or welding required
- Downpipe gasket not included
- Required gasket part number: 18328612538
- Professional installation recommended for best results
Fitment
- 2015 and up BMW M240i and XDrive
- 2016 to 2019 BMW 340i and XDrive
- 2020 to 2024 BMW M340i and XDrive (does not fit 2025+)
- 2016 and up BMW 440i and XDrive
- 2016 and up BMW 540i and XDrive
- 2016 and up BMW 740i and XDrive
- 2017-2024 X3 M40 G01/G02
- 2017-2024 X4 M40 G01/G02
- 2019-2022 G05 BMW X5 40i & xDrive Non LCI only
- 2018-2022 G06 X6 40I & x drive Non LCI only
- 2019+ G07 BMW X7 40i & xDrive Non LCI only
- 2019 and up G29 BMW Z4 M40i
- 2019 and up 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:
- You are responsible for compliance with all applicable emissions laws and regulations.
- MAD and its affiliates disclaim any liability for improper or unlawful use of this product.
- 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.
