aFe Performance Downpipes with Cat - F80 M3, F82 M4

gains up to +21 horsepower and +23 lbs. x ft. of torque

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•In testing this system resulted in gains up to +21 horsepower and +23 lbs. x ft. of torque
•Includes 200 CPSI, 48-state legal catalytic converters to prevent check engine lights
•Constructed of 3" mandrel-bent, 304 stainless steel tubing 
•Retains Factory O2 Sensor Locations
•100% TIG-Welded 
•Thick flanges to ensure a leak-free seal
•Includes high quality, O.E. style, V-band turbo flanges

aFe Power’s introduces the Elite Twisted Steel down-pipes with cats for the 2015 BMW M3/M4 (F80/82) with the L6-3.0L (tt) S55 engine. The down-pipes are 100% TIG-welded and constructed of mandrel-bent, 3", 304 stainless steel tubing with thick flanges to ensure a leak-free seal. In testing, this system resulted gains up to +21 horsepower and +23 lbs. x ft. of torque. These down-pipes use 200 CPSI, 48-state legal catalytic converters and includes all components for a hassle-free installation.

Dual High Flow Catalytic Converters:
200 CPSI catalytic converters are used for maximum flow.

100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks.

Factory O2 Sensor Locations: 
Factory mounting locations for all O2 sensors.

Hassle-Free Installation:
All necessary hardware is included for a hassle-free installation.

aFe down pipes are engineered and manufactured in our Corona, California manufacturing facility.

Notice of Fault Codes/Check Engine Light - Using any Racing downpipe could result in a check engine light and fault codes, even with sport cats. Although we have heard of cases where no check engine light appeared, these Racing downpipes are not designed to meet emissions testing and regulations. Race software that is specific to your mods is strongly advised to better adapt your car to a racing environment, keep the fault codes from appearing, optimize power gains, and improve general drivability. Our Epic Motorsports Race software is strongly encouraged to meet all of your tuning goals.

Notice of Emissions Non-Compliance. Removing, disabling, or altering emissions equipment on a pollution-controlled road vehicle is illegal. Installing devices or software that trick, disable, or modify emissions controls and monitors on a pollution-controlled road vehicle is also illegal. This product is sold only for racing, competition, track, hobby, or other off-road use. It's use is prohibited in any motor vehicle that is subject to emissions inspection or control. Legal only for racing vehicles that may never be used, or registered or licensed for use, upon a public highway. Some suppliers will not ship to certain states, requiring extra delivery time. We will advise you of any delays.

BMW Fitments:

3 Series
F80 (2015+) > M3 (2015+)
4 Series
F82 / F83 (2015+) > M4 (2015+)

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