Active Autowerke G20 M340i/G22 M440i B58 GESI Downpipe

The Active Autowerke B58 GESI catted downpipe is for the 2020-2024 BMW G20 M340i and G22/G23/G26 M440i. The factory downpipe holds back the single-turbo B58, and this pipe replaces it with a larger, freer-flowing design. The turbo flange gasket comes installed in the downpipe flange, because some installers were damaging it on fitment.

For 2025+ cars with the GPF downpipe, see the Active Autowerke B58N downpipes.

GESi UHO-Series Catalytic Converters are EPA registered and compliant in 49 states and fully OBD2 compliant, perfect for use on 1996 and newer vehicles. Say goodbye to Check Engine Lights and failed emissions tests! NO CEL when using this downpipe GESI EPA registered high flow and fully OBD2 compliant EPA compliant for use on OBD2 vehicles (1996 and newer) except in California

What It Does

The downpipe uses 4.5 in stainless piping for more power, quicker spool and durability, then tapers to 3.5 in at a stainless flex joint and steps down to 80 mm to meet the factory exhaust. Active Autowerke never drops below the stock 80 mm diameter. A 4.5 in GESI high-flow cat with a 400 cpsi substrate sits in the pipe.

Materials and Construction

TIG-welded 304 stainless steel with 1.5 mm wall thickness and a cast stainless upper V-band for a precise fit. It bolts on with no cutting or welding.

Features

• 4.5 in piping tapering to 3.5 in and 80 mm
• 4.5 in GESI high-flow cat, 400 cpsi
• Turbo flange gasket pre-installed
• Cast stainless upper V-band
• Bolt-on, no cutting or welding

Specs

• Part number: 11-062
• Brand: Active Autowerke
• Type: catted downpipe
• Piping: 4.5 in to 3.5 in to 80 mm
• Wall thickness: 1.5 mm
• Engine: BMW B58 3.0L turbo inline-six (2024 and older)
• Shipping weight (Active Autowerke): 30 lb (13.6 kg)

Fitment Notes

• For 2024 and older cars. 2025+ cars use the B58N GPF downpipe.
• Active Autowerke fitment applies to US-model cars only.
• Active Autowerke covers the shell and tube ends for 5 years / 50,000 miles and the catalyst core for 2 years / 25,000 miles for the original buyer. Excessive burble (more than stock) voids the warranty because it destroys the catalyst core.
• Questions before you order? Call or text (310) 231-0292 or email Online@AutoTalent.com.
• Shop all Active Autowerke downpipes, B58 downpipes, every catted downpipe we carry, or the full Active Autowerke range.

FAQ

Does it fit my 2025 M340i?
No. 2025+ cars use the Active Autowerke B58N downpipe.

Is the gasket included?
Yes, it comes installed in the flange.

Do I need a tune?
A tune is recommended to get the most from any downpipe.