Active Autowerke Active Autowerke S58 / X3M/X4M Downpipes W Aflow CATs - 11-070A - F97 X3 M, F98 X4 M 11-070A

Active Autowerke S58 / X3M/X4M Downpipes W Aflow CATs - 11-070A - F97 X3 M, F98 X4 M

These downpipes provide faster turbo spool, increased power, and a high-performance exhaust sound.
Active Autowerke Active Autowerke
T#: 50837018 | Part#: 11-070A
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Active Autowerke Active Autowerke S58 / X3M/X4M Downpipes W Aflow CATs - 11-070A - F97 X3 M, F98 X4 M 11-070A
Active Autowerke S58 / X3M/X4M Downpipes W Aflow CATs - 11-070A - F97 X3 M, F98 X4 M
$2399.00

Upgrade your BMW X3M or X4M with Active Autowerke’s S58 Signature Downpipes. Designed to eliminate the back-pressure of restrictive factory components, these downpipes provide faster turbo spool, increased power, and a high-performance exhaust note without the typical "Check Engine Light" (CEL) headaches.

Performance Engineering

  • Optimal Flow: Features 3-inch 304 stainless steel piping that transitions to 70mm to match the OEM exhaust system perfectly.

  • Rapid Spool: High-flow design allows exhaust gases to exit faster, significantly reducing turbo lag.

  • High-HP Ready: Rated for applications up to 800 HP and built to withstand temperatures up to 1500°F.

Advanced Emissions Technology

  • No CEL Guarantee: Includes 4.5" Active Aflow catalytic converters, guaranteed not to trigger a CEL for cat efficiency (2-year replacement warranty).

  • EPA Compliant: 49-state legal and fully OBD2 compliant (excluding California).

  • High Efficiency: Reaches operational efficiency within just 9 seconds of startup.

Quality & Construction

  • Durable Build: TIG-welded 304 stainless steel with a furnace-braised 400 CPSI catalyst for long-term reliability.

  • Easy Installation: Direct bolt-on fitment with cast upper V-bands; no cutting or welding required.

  • Warranty: 5-year/50,000-mile warranty on the shell/tubing and 2-year/25,000-mile warranty on the catalytic core.

Important Note: These downpipes are not legal for use in California. Warranty is void if the vehicle uses "excessive burble" tunes, as these physically damage the catalytic core.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.


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Product Q&A

Lifetime Replacement

This product is not eligible for Lifetime Replacement
MAKE MODEL SUBMODEL ENGINE Special Fitment Notes
BMW F97 X3 M S58 3.0L Use vehicle selector to confirm fitment
BMW F98 X4 M S58 3.0L Use vehicle selector to confirm fitment
*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.