Active Autowerke F90 M5/M8/X5 M/X6 M S63 GESI Downpipes

These Active Autowerke S63 downpipes are for the BMW F90 M5, F91/F92/F93 M8 and F95 X5 M / F96 X6 M. They replace the very restrictive factory downpipes and include the lower section that some brands sell separately as a "mid pipe". Each side carries a 4.5 in GESI G-Sport ultra high output high-flow cat, and Active Autowerke says no performance tune is needed.

They accept the factory O2 sensor heat shield, so the engine bay keeps a stock, sleeper look.

This variant includes a pair of 4.5" high flow GESI catalytic converters that will NOT produce a CEL! 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. GESi proprietary precious metal loading technology ensures greatly reduced emissions, eliminating most "Check Engine Lights". 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

Opening up the factory downpipes cuts radiant heat and lets the twin turbos spool sooner, which Active Autowerke says brings a big gain in horsepower and torque across the rev range and less turbo lag.

Materials and Construction

Made in house in Miami, Florida from TIG-welded 304 stainless steel. Each set uses a factory-matched 3.5 in V-band inlet that tapers into a mandrel-bent body, with a 400 cpsi catalyst substrate and cast stainless upper V-band. Every set is checked for fit, and they bolt on with no cutting or welding.

Features

• Includes the lower "mid pipe" section
• Pair of 4.5 in GESI high-flow cats, 400 cpsi
• Factory-matched 3.5 in V-band inlet
• Accepts the OEM O2 sensor heat shield
• No tune needed, per Active Autowerke
• Made in Miami, Florida

Specs

• Part number: 11-063
• Brand: Active Autowerke
• Type: catted downpipes (pair)
• Catalyst: GESI G-Sport, 4.5 in, 400 cpsi
• Inlet: 3.5 in V-band
• Engine: BMW S63 4.4L twin-turbo V8
• Shipping weight (Active Autowerke): 55 lb (24.9 kg)

Fitment Notes

• X5 M and X6 M are listed for 2020-2023 (S63). 2024+ X5 M / X6 M use the S68 engine; contact us before ordering for those.
• 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, every catted downpipe we carry, or the full Active Autowerke range.

FAQ

Do I need a tune?
Active Autowerke says no performance tune is needed.

Does it fit the 2024+ X5 M?
The 2024+ X5 M and X6 M use the S68 engine; contact us first.

Can I keep the factory heat shield?
Yes, it accepts the OEM O2 sensor heat shield.