Upgrade from the stock B46 downpipe to the MAD B46 catless downpipe for maximum airflow, power, and sound
The MAD BMW B46 catless downpipe is the perfect upgrade for unlocking the full potential of your turbocharged engine. By removing the restrictive factory catalytic converter, this downpipe allows your turbo to spool faster and more efficiently, giving you better throttle response and more power across the rev range. You’ll also notice a deeper, more aggressive exhaust tone.
On a tuned BMW B46 with the stock turbo, you can expect gains of up to 30 horsepower, with even more potential on upgraded turbo setups.
The built-in flex section helps reduce stress on the system by absorbing vibration and movement from the engine and heat cycles, making it a reliable and long-term upgrade.
This downpipe is designed specifically for U.S. B46 models and is not compatible with vehicles equipped with OPF.
Features
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Compatible with both right-hand drive and left-hand drive vehicles
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Smooth mandrel bends for maximum flow and zero drone
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Up to 30HP gain on stock turbos, more with upgraded setups
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Flex section for added durability and vibration absorption
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Lifetime warranty on fitment and defects
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90-day return period
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Ships within 1 to 2 business days
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Precision fitment for an easy install
Fitment
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2016 and up BMW 120i and 125i
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2016 and up BMW 220i and 230i
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2016 and up BMW 320i, 330e, 330i (F chassis and G chassis)
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2016 and up BMW 420i and 430i
- 2020+ 2.0 Toyota Supra
Note:
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U.S. model fitment only (B46 engines)
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Not compatible with vehicles equipped with OPF
SKU: MAD-131
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:
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You are responsible for compliance with all applicable emissions laws and regulations.
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MAD and its affiliates disclaim any liability for improper or unlawful use of this product.
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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.
