Description
Unlock the full performance potential of your BMW B58-powered vehicle or Toyota Supra with the MAD B58 4.5" 200 Cell Catted Downpipe. Designed for enthusiasts seeking increased horsepower, improved throttle response, and a more aggressive exhaust note, this premium downpipe delivers exceptional flow while maintaining a high-flow catalytic converter design.
Constructed from high-quality 304 stainless steel, the MAD B58 Downpipe is engineered to withstand extreme temperatures and demanding driving conditions. Its smooth mandrel-bent design minimizes exhaust restriction and back pressure, allowing exhaust gases to flow more efficiently for enhanced engine performance.
Featuring a 200-cell high-flow catalytic converter, this race-oriented downpipe provides an ideal balance between performance and reduced emissions. The integrated flex section helps absorb drivetrain movement and reduces stress on exhaust components, while the included bracket ensures secure installation and long-term durability.
Designed as a direct bolt-on upgrade, the MAD B58 Catted Downpipe installs without cutting or welding and is fully compatible with both factory and aftermarket exhaust systems. Whether you're running stock turbochargers or upgraded turbo setups, this downpipe is capable of supporting significant performance gains.
Features
- Premium 304 stainless steel construction
- Large 4.5-inch downpipe design
- 200-cell high-flow catalytic converter
- Direct bolt-on installation
- No cutting or welding required
- Integrated flex section
- Includes mounting bracket
- Compatible with both left-hand drive and right-hand drive vehicles
- Smooth bends for maximum exhaust flow
- Designed to minimize drone
- Up to 30 horsepower gains on stock turbochargers
- Supports even greater gains with upgraded turbos
- Spot-on fitment
- Compatible with factory and aftermarket exhaust systems
- Lifetime warranty against defects and fitment issues
- Ships within 1-2 business days
- Race-use design for maximum performance
Important Installation Note
- Downpipe gasket is not included
- BMW Gasket Part Number Required: 18328612538
Vehicle Fitment
- 2015+ BMW M240i
- 2015+ BMW M240i xDrive
- 2016-2019 BMW 340i
- 2016-2019 BMW 340i xDrive
- 2020-2024 BMW M340i
- 2020-2024 BMW M340i xDrive
- Does NOT fit 2025+ BMW M340i models
- 2016+ BMW 440i
- 2016+ BMW 440i xDrive
- 2016+ BMW 540i
- 2016+ BMW 540i xDrive
- 2016-2020 BMW 640i Gran Turismo (G32)
- 2016-2020 BMW 640i Gran Turismo xDrive (G32)
- 2016+ BMW 740i
- 2016+ BMW 740i xDrive
- 2017-2024 BMW X3 M40i (G01/G02)
- 2017-2024 BMW X4 M40i (G01/G02)
- 2019-2022 BMW X5 40i (G05, Non-LCI Only)
- 2019-2022 BMW X5 xDrive40i (G05, Non-LCI Only)
- 2018-2022 BMW X6 40i (G06, Non-LCI Only)
- 2018-2022 BMW X6 xDrive40i (G06, Non-LCI Only)
- 2019+ BMW X7 40i (G07, Non-LCI Only)
- 2019+ BMW X7 xDrive40i (G07, Non-LCI Only)
- 2019+ BMW Z4 M40i (G29)
- 2019+ Toyota Supra 3.0L
Emissions Disclaimer
Race Use Only
This product is not legal for sale or use on pollution-controlled motor vehicles operated on public roads, highways, or streets. It is intended solely for off-road, racing, or closed-course competition vehicles where such modifications are permitted by law.
By purchasing and installing this product, you acknowledge and agree that:
- You are responsible for ensuring compliance with all applicable federal, state, provincial, and local emissions regulations.
- MAD and its affiliates assume no liability for improper, unlawful, or unintended use of this product.
- Installation or use on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state or local laws.
- It is the purchaser's responsibility to verify legal compliance before purchase and installation.
