Unlock the full performance potential of your BMW S58-powered M car with the MAD S58 300 Cell Catted Downpipes for the G80 M3, G82/G83 M4, and G87 M2. Engineered for enthusiasts seeking increased horsepower, sharper throttle response, and a deeper exhaust tone without triggering a check engine light, these premium high-flow downpipes deliver exceptional performance and reliability.

Constructed from high-quality 304 stainless steel, the MAD S58 Catted Downpipes are built to withstand extreme temperatures, harsh driving environments, and high-performance applications. The smooth mandrel-bent piping and optimized flow path reduce exhaust restriction, allowing the turbochargers to spool more efficiently while improving horsepower and torque throughout the powerband.

Equipped with premium 300 cell high-flow catalytic converters, these downpipes maintain excellent exhaust flow while minimizing the risk of catalyst-related check engine lights. The integrated flex section improves durability by reducing stress on exhaust components during engine movement and thermal expansion.

Designed as a direct bolt-on upgrade, the MAD S58 Catted Downpipes install easily with no cutting or welding required. They are compatible with both factory and most aftermarket exhaust systems, making them an ideal performance upgrade for street, track, and custom builds.

MAD also backs these downpipes with a No CEL Guarantee. If a catalyst-related check engine light occurs within 2 years of purchase, MAD will replace the downpipes free of charge. Additionally, the lifetime warranty covers manufacturer defects, including cracks in the piping or welds.

Experience improved turbo response, enhanced exhaust sound, and significant performance gains with the MAD S58 300 Cell Race Catted Downpipes.

Features

• Premium 304 stainless steel construction
• High-flow 300 cell catalytic converters
• No check engine light guarantee
• Smooth bends for maximum exhaust airflow
• Improved horsepower, torque, and throttle response
• Up to 30HP gains on stock turbochargers
• Greater gains possible with upgraded turbo setups
• Deep and aggressive exhaust tone
• Flex section for increased durability and reduced stress
• Direct bolt-on installation
• No cutting or welding required
• Compatible with factory and most aftermarket exhaust systems
• Spot-on OEM-style fitment
• Compatible with right-hand drive and left-hand drive vehicles
• Ships within 1 to 2 business days
• Lifetime warranty against manufacturer defects and fitment issues

No CEL Guarantee

• Valid for 2 years from the original purchase date
• Covers catalyst-related check engine lights
• MAD will replace the downpipes free of charge if CEL occurs

Important Installation Note

• Downpipe gasket is not included
• BMW Part Number Required: 18308053348
• Quantity Required: 2

Vehicle Fitment

• 2021+ BMW M3 G80
• 2021+ BMW M4 G82 Coupe
• 2021+ BMW M4 G83 Convertible
• 2023+ BMW M2 G87

Emissions Disclaimer

• This product is intended for off-road, race, or closed-course competition use only
• Not legal for sale or use on pollution-controlled vehicles operated on public roads, highways, or streets
• Buyer is responsible for compliance with all local, state, and federal emissions laws and regulations
• Use on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws

Upgrade your BMW G80 M3, G82/G83 M4, or G87 M2 with MAD S58 300 Cell Catted Downpipes. Gain horsepower, improve turbo response, and enjoy a deeper exhaust tone with No CEL Guarantee.