In 2019, Active took on the challenge posed by the BMW enthusiast community who insisted that it was physically impossible to develop and equal length midpipe for the F8X M platform (all equal length products were full exhaust systems which used the space after the differential to equalize the length) and after a lot of research, development and testing, Active developed the Active Autowerke Signature Equal Length midpipe which was recognized as innovative when Active was granted patents both in the US and in the EU/UK regions.

This patent also extends to midpipes on the G8X M platform. Of course, Active has to spend resources defending their patents from all the copycats who primarily source products from China where there are companies willing to look the other way on copyrights and other legal protections. Active thanks its customers for their support so that it can continue to develop and innovate for everyone's favorite car brand BMW.

• NO CEL for catalytic efficiency when using this downpipe
• GESI EPA-registered high flow and fully OBD2-compliant
• Casted upper stainless steel V-Band for precise fitment
• 4.50" diameter piping allows for maximum power output
• Quicker turbo spool
• Rated for 500 to 850 hp applications
• Withstands up to 1500°F
• Can reach operational efficiency within 9 seconds of startup
• Easily bolts on - no cutting or welding required
• Durable construction from TIG-welded 304 stainless steel
• Precise fitment
• Ultra-high flow 400 cell per square inch catalyst
• EPA-compliant for use on OBD2 vehicles (1996 and newer) except in California
• 304 stainless steel substrate is furnace braised to the mantle for outstanding durability
• GESi's proprietary precious metal loading technology ensures greatly reduced emissions
• Ideal for Forced Induction Applications with no loss of HP
• Both passengers and drivers are safe from harmful emissions and noise
• Covered by 5 Year / 50,000 Mile Warranty (on shell and tube ends) and 25,000 Mile Warranty on the Catalytic core
• Made in Miami, Florida

Signature Benefits

The speed of a turbo’s impeller wheel is limited by exhaust back pressure. A larger downpipe relieves some of this pressure, resulting in quicker and more efficient spool. With Active Autowerke’s Signature downpipe, your B58 can rev quicker and deliver more horsepower and torque.

Minimising back pressure while retaining daily driveability was the goal of our B58 downpipe. Owners can now upgrade to a product that is affordable, reliable, and easy to install. 

After months of research and development, our engineers settled on a 4.5” diameter pipe, which utilises the least number of bends possible. The large volume helps the turbo spool as quickly as possible by eliminating back pressure during spool-up. We are ushering in a new era in performance where we maintain air control standards without significant losses in power by using the GESI super high-output catalytic converter in our signature downpipe.

Constructed entirely from 304 stainless steel with 1.5MM wall thickness, we are confident that you’ll be pleased with how robust and durable this downpipe is. Trouble-free installation and a long lifespan ensure that you’ll enjoy many miles of performance with your B58!

• BMW G-series M240i Euro version 2019+
  
• BMW G-series M340i Euro version 2019+
  
• BMW G-series M440i Euro version 2019+

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Warranty

Covered by 5 Year / 50,000 Mile Warranty (on catalytic converter)