Active Autowerke S58 Catted Downpipes – BMW G80 M3 / G82 M4 / G87 M2

Unlock the true sound and performance of your S58-powered BMW with the Active Autowerke Signature Catted Downpipes, engineered for the G80 M3, G82 M4, and G87 M2. Designed to reduce exhaust restriction and improve turbo efficiency, these high-performance downpipes deliver quicker spool, increased power, and a more aggressive exhaust note—bringing back the raw character expected from a true BMW M car.

Built around Active Autowerke’s advanced Active A-Flow catalytic converter technology, this system offers a rare combination of performance and compliance. Unlike many aftermarket options, these downpipes are designed to retain emissions efficiency while significantly improving exhaust flow.

Key Features

• 3-inch stainless steel downpipe design for improved exhaust flow
• Active A-Flow high-performance catted system
• No CEL (Check Engine Light) for catalytic efficiency (manufacturer guaranteed)
• Faster turbo spool and improved throttle response
• Rated for high-performance builds (500–850 HP per cat)
  
• Ultra high-flow 400 CPSI catalytic converters
  
• Full 304 stainless steel construction including substrate
  
• Cast stainless steel V-band connections for precise fitment
  
• Integrated stainless flex joints for durability
  
• Direct bolt-on installation with no cutting or welding required
  
• Fully OBD2 compliant (except California)
  
• Manufactured in the USA (Miami, Florida)

Performance & Sound

The factory S58 downpipes are restrictive, limiting exhaust flow and muting the sound of the engine. The Active Autowerke Signature Downpipes improve exhaust evacuation, resulting in:

• Quicker turbo spool and improved boost response
  
• Increased horsepower and torque potential
  
• A deeper, more aggressive exhaust tone
  
• Enhanced overall driving experience

Advanced Active A-Flow Catalytic Technology

Active Autowerke’s proprietary catalytic converters are designed for both performance and emissions efficiency.

• EPA registered and OBD2 compliant (excluding California)
  
• High-flow design reduces back pressure without sacrificing emissions control
  
• Proprietary precious metal loading reduces risk of CEL
  
• Capable of reaching operating efficiency within seconds of startup
  
• Withstands temperatures up to 1500°F

These converters provide a reliable solution for high-performance builds without the common issues found in lower-quality catted systems.

Installation

Direct bolt-on design ensures straightforward installation using factory mounting points.

Professional installation is highly recommended

Installation is available at Sequential Racing – Altona North, Melbourne
To organise installation, contact: sales@sequentialracing.com.au

Vehicle Fitment

S58 Twin Turbo

• BMW G80 M3
  
• BMW G82 M4
  
• BMW G87 M2

What’s Included

• Active Autowerke S58 Catted Downpipes (Pair)

Important Notes

• Not legal for use on vehicles registered in California
  
• Warranty void if excessive burble tuning is used (can damage catalytic core)
  
• Federal regulations apply regarding emissions modifications

Warranty

• 5 Year / 50,000 Mile Warranty (shell and tube ends)
  
• 2 Year / 25,000 Mile Warranty (catalytic core, original purchaser only)

Why Choose Sequential Racing?

Sequential Racing supplies premium performance upgrades for BMW M platforms, offering trusted brands and proven solutions. The Active Autowerke Catted Downpipes are one of the best options for enthusiasts seeking power gains without sacrificing reliability or drivability.

• No CEL guarantee for peace of mind
  
• High-performance gains with emissions-conscious design
  
• Premium construction and proven durability

Upgrade your BMW G80 M3, G82 M4, or G87 M2 with the Active Autowerke S58 Catted Downpipes and experience improved performance, sound, and responsiveness.