MAD G8X S58 200 Cell Catted Downpipes – BMW M3 / M4 (G80/G82) + M2 (G87)

In Stock: Ships in 1-2 business days
Available to Order: Ships in 3-4 Weeks

Looking for more power and sound from your S58 without going fully MaxFlow?

The factory downpipes restrict exhaust flow and hold back both performance and sound — but going MaxFlow isn't the only way to open up the S58.

The MAD S58 200 Cell Catted Downpipes replace the restrictive factory catalytic converters with high-flow 200 cell Euro 5 catalytic converters, improving exhaust flow while retaining a catted setup.

More flow.
More power.
More sound.

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Why these Downpipes

The 200 cell high-flow catalytic converters are designed to significantly reduce back pressure compared to the restrictive factory downpipes, allowing the S58's twin turbos to breathe more efficiently.

The result is improved turbo response, increased exhaust volume, and additional power potential. On stock turbos, gains of up to 30HP are possible, with even more potential on upgraded turbo setups.

An integrated flex section helps reduce stress and unwanted vibration while maintaining proper fitment and long-term reliability.

High-flow 200 cell cats.
Faster turbo response.
Built for real performance gains.

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Installation Overview

• Direct bolt-on replacement for factory downpipes
• No cutting or welding required
• Compatible with OEM and aftermarket exhaust systems
• Compatible with left-hand drive and right-hand drive vehicles
• Professional installation recommended

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Fitment

BMW S58 Platform:

• G80 M3
• G81 M3 Touring
• G82 M4
• G83 M4 Convertible
• G87 M2

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Construction

• 200 Cell Euro 5 High-Flow Catalytic Converters
• 304 Stainless Steel Construction
• Smooth Piping Transitions for Maximum Exhaust Flow
• Smooth Mandrel Bends
• Integrated Flex Section for Reduced Stress
• Engineered for Minimal Back Pressure
• Precision Fitment

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What's Included

• MAD S58 200 Cell Catted Downpipes
• Required Downpipe Hardware

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Warranty & Returns

• Eligible for a 90-day return window if unused, uninstalled, and in original condition
• Backed by a lifetime warranty on defects and fitment

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Important Notes

• Intended for off-road / motorsport use only
• 200 cell high-flow catalytic converters do not make this product emissions compliant for public-road use
• Not legal for use on public roads, highways, or emissions-controlled vehicles

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Automaz Approved

If you want to open up the S58 without going fully MaxFlow, these are a great middle ground.

The 200 cell high-flow catalytic converters reduce the restriction of the factory downpipes while giving you more sound, improved flow, and additional performance potential.

More aggressive than stock without going fully MaxFlow.

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, Automaz Collective, 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.