Description
Unlock the performance potential of your BMW B58-powered vehicle or Toyota Supra 3.0 with the MAD 4.5-Inch 200 Cell Catted Downpipe with Bracket. Designed to maximize exhaust flow while maintaining excellent durability, this premium downpipe delivers increased horsepower, improved torque, faster turbo spool, sharper throttle response, and a deeper, more aggressive exhaust note.
Manufactured from premium 304 stainless steel, this downpipe is built to withstand extreme temperatures and demanding driving conditions. Its smooth mandrel-bent design minimizes exhaust restriction, allowing your turbocharger to operate more efficiently while reducing backpressure.
The integrated 200-cell high-flow catalytic converter helps improve exhaust flow compared to the restrictive factory catalytic converter while maintaining outstanding performance. The included flex section enhances durability by reducing stress on the exhaust system during engine movement.
Designed as a true direct bolt-on replacement, installation requires no cutting or welding and is fully compatible with both factory and most aftermarket exhaust systems. Whether your vehicle is stock or equipped with upgraded turbochargers, this downpipe provides substantial performance improvements while delivering an aggressive performance exhaust sound.
Features
- Premium 304 stainless steel construction
- Large 4.5-inch high-flow design
- Includes mounting bracket
- High-flow 200-cell catalytic converter
- Direct bolt-on installation
- No cutting or welding required
- Compatible with factory and most aftermarket exhaust systems
- Compatible with left-hand drive and right-hand drive vehicles
- Smooth mandrel bends for maximum exhaust flow
- Flex section improves durability and reduces exhaust stress
- Increased horsepower, torque, and throttle response
- Up to 30 horsepower gains on stock turbochargers with even greater gains on upgraded turbo setups
- More aggressive exhaust sound without excessive drone
- Precision fitment
- Lifetime warranty covering manufacturing defects and fitment
- Ships within 1-2 business days
Installation Notes
- Direct replacement for the factory downpipe.
- Downpipe gasket is not included.
- BMW Gasket Part Number 18328612538 is required for installation.
Vehicle Fitment
Important: Does not fit European-specification B58 vehicles equipped with OPF (Otto Particulate Filter).
- 2015-Up BMW M240i
- 2015-Up 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 and newer BMW M340i models
- 2016-Up BMW 440i
- 2016-Up BMW 440i xDrive
- 2016-Up BMW 540i
- 2016-Up BMW 540i xDrive
- 2016-2020 BMW 640i Gran Turismo (G32)
- 2016-2020 BMW 640i xDrive Gran Turismo (G32)
- 2016-Up BMW 740i
- 2016-Up BMW 740i xDrive
- 2017-2024 BMW X3 M40i (G01)
- 2017-2024 BMW X4 M40i (G02)
- 2019-2022 BMW X5 40i (G05) Non-LCI models only
- 2019-2022 BMW X5 xDrive40i (G05) Non-LCI models only
- 2018-2022 BMW X6 40i (G06) Non-LCI models only
- 2018-2022 BMW X6 xDrive40i (G06) Non-LCI models only
- 2019-Up BMW X7 40i (G07) Non-LCI models only
- 2019-Up BMW X7 xDrive40i (G07) Non-LCI models only
- 2019-Up BMW Z4 M40i (G29)
- 2019-Up Toyota GR Supra 3.0L (A90/A91)
Important Notes
- Intended for race use only.
- Not compatible with Euro-specification B58 vehicles equipped with OPF.
- Downpipe gasket must be purchased separately.
Emissions Disclaimer
This product is intended for off-road, racing, or closed-course competition vehicles only. It is not legal for sale or use on pollution-controlled vehicles operated on public roads, streets, or highways where emissions regulations apply.
By purchasing this product, you acknowledge that:
- You are responsible for complying with all applicable federal, state, provincial, and local emissions regulations.
- The manufacturer and seller assume no liability for improper or unlawful installation or use.
- Installation on pollution-controlled vehicles operated on public roads may violate the Federal Clean Air Act and similar state or local emissions laws.
Please verify your local emissions laws before purchasing or installing this product.
