Description
Unlock the full potential of your BMW S58-powered M car with the MAD S58 Catted Downpipes featuring integrated flex sections. Designed specifically for the BMW G87 M2, G80 M3, G82 M4, and G83 M4, these high-performance downpipes improve exhaust flow, increase power output, enhance throttle response, and deliver a more aggressive exhaust note while utilizing high-flow catalytic converters.
Constructed from premium 304 stainless steel and engineered for maximum efficiency, these downpipes are the ideal solution for enthusiasts seeking significant performance gains without sacrificing durability or fitment quality.
Increased Power and Performance
The factory downpipes are designed with restrictive catalytic converters that can limit exhaust flow and overall engine efficiency. The MAD S58 Catted Downpipes replace these restrictive components with high-flow 200 Cell Euro 5 catalytic converters, allowing exhaust gases to exit more efficiently.
Performance benefits include:
• Increased horsepower and torque
• Improved throttle response
• Faster turbocharger spool-up
• Reduced exhaust backpressure
• Enhanced engine efficiency
• Potential gains of up to 30 horsepower on stock turbochargers
• Greater performance potential when used with upgraded turbo systems
High-Flow 200 Cell Euro 5 Catalytic Converters
The integrated 200 Cell Euro 5 catalytic converters are engineered to provide an excellent balance between performance and exhaust flow.
Benefits include:
• Improved exhaust gas flow compared to factory catalytic converters
• Reduced restriction and backpressure
• Enhanced exhaust tone
• Increased performance potential
• Durable high-temperature construction
The high-flow catalyst design allows the S58 engine to breathe more freely while maintaining a refined exhaust character.
Integrated Flex Section Design
Each downpipe features an integrated flex section that helps absorb engine movement and thermal expansion during operation.
Advantages include:
• Reduced stress on turbochargers
• Improved durability of the exhaust system
• Better resistance to vibration and movement
• Enhanced long-term reliability
• Improved fitment consistency
Premium 304 Stainless Steel Construction
Manufactured from high-grade 304 stainless steel, these downpipes are built to withstand extreme temperatures and demanding performance driving conditions.
Construction features include:
• Corrosion-resistant stainless steel construction
• High-temperature durability
• Precision-engineered welds
• Smooth mandrel bends for optimal airflow
• Long-lasting performance and reliability
Direct Bolt-On Installation
The MAD S58 Catted Downpipes are engineered as a direct-fit upgrade for factory-equipped S58 vehicles.
Installation benefits include:
• Direct bolt-on fitment
• No cutting required
• No welding required
• Compatible with factory exhaust systems
• Compatible with most aftermarket exhaust systems
• Suitable for both right-hand drive and left-hand drive vehicles
Additional Features
• 200 Cell Euro 5 high-flow catalytic converters
• Integrated flex section design
• Smooth bends for maximum airflow
• Up to 30HP gains on stock turbochargers
• Compatible with upgraded turbocharger setups
• Lifetime warranty against manufacturing defects and fitment issues
• Fast and precise fitment
• Orders typically ship within 1–2 business days
Important Installation Information
• Downpipe gaskets are not included
• Requires two downpipe gaskets (Part Number: 18308053348)
• Professional installation is strongly recommended
• ECU tuning may be recommended for optimal performance results
Vehicle Fitment
BMW M2
• BMW M2 (G87) 2023+
BMW M3
• BMW M3 (G80) 2021+
BMW M4 Coupe
• BMW M4 (G82) 2021+
BMW M4 Convertible
• BMW M4 (G83) 2021+
Fitment Notes
• Designed exclusively for BMW vehicles equipped with the S58 twin-turbocharged engine
• Compatible with both left-hand drive and right-hand drive models
• Works with factory and most aftermarket cat-back exhaust systems
• Direct replacement for factory downpipes
Race Use Disclaimer
This product is intended for off-road, racing, motorsport, or closed-course competition use only where permitted by law.
It may not be legal for installation or use on pollution-controlled vehicles operated on public roads, highways, or streets. The purchaser is solely responsible for ensuring compliance with all applicable local, state, federal, and international emissions regulations before installation or use.
Use of this product on public roads may violate emissions laws, including the Federal Clean Air Act and similar regulations.
