Description
Unlock hidden performance and improve turbo response with the MAD Catted Downpipe, specifically designed for U.S.-spec BMWs equipped with the B46 engine. This high-performance upgrade offers increased airflow, reduced turbo lag, and a sportier exhaust tone while maintaining emissions-conscious functionality for off-road and track use.
The integrated high-flow catalytic converter significantly lowers exhaust restriction compared to the factory downpipe, allowing your turbo to spool faster and produce more power. On tuned vehicles with the factory turbocharger, expect gains of up to 30 horsepower, with even greater improvements possible with upgraded turbo setups.
The inclusion of a flex section ensures durability by reducing stress from engine movement and thermal cycles. Engineered for precision and longevity, the MAD B46 downpipe is a bolt-on solution that delivers consistent results.
Key Features
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High-Flow Catalytic Converter
Improves exhaust flow and supports higher horsepower while remaining emissions-conscious for off-road use. -
Up to 30 Horsepower Gains on Stock Turbo
Increased performance, improved throttle response, and reduced turbo lag. -
Mandrel-Bent Construction
Smooth bends eliminate restriction for maximum exhaust velocity and a deeper exhaust note with no drone. -
Reinforced Flex Section
Enhances durability by absorbing engine movement and thermal expansion. -
Direct Bolt-On Installation
Designed for a seamless fit using OEM mounting points. No cutting or fabrication required. -
Left- and Right-Hand Drive Compatible
Versatile fitment across multiple chassis and drivetrain configurations. -
Built for U.S.-Spec B46 Engines
Not compatible with vehicles equipped with OPF (Gasoline Particulate Filter).
Product Specifications
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Material: Stainless Steel
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Catalyst: Integrated High-Flow Cat
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Fitment: Direct Bolt-On
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Power Gains: Up to 30 HP on tuned stock turbo setups
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Warranty: Lifetime warranty on fitment and manufacturing defects
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Shipping Time: 1–2 business days
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Return Period: 90 days
Vehicle Fitment
For U.S.-spec BMWs with the B46 engine only. Not compatible with vehicles equipped with OPF.
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BMW 1 Series: 2016+ 120i, 125i
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BMW 2 Series: 2016+ 220i, 230i
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BMW 3 Series: 2016+ 320i, 330e, 330i (F30, G20, etc.)
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BMW 4 Series: 2016+ 420i, 430i
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BMW 7 Series: 730i (B46 engine only)
Disclaimer:
This product is intended for off-road or racing use only. It is not certified for use on public roads and may not comply with local, state, or federal emissions regulations. Please verify local laws before purchase or installation.