aFe is proud to introduce the aFe Twisted Steel® non-catalytic Racing down-pipe for the 2016, 2017 and 2018 model BMW F30 340i with the L6-3.0L (B58) engine. In testing this system resulted in a max gain of 30 horsepower and 31 lbs. x ft. of torque thanks to the complete elimination of your restrictive OE BMW front catalytic converter. Straight pipe is the least restrictive option for cars that are not driven on the street, and this section of pipe represents a subtantial boost in power for a relatively small cost. This is perfect for a track or race only BMW that does not need to comply with street-based emissions laws.
This high performance downpipe delivers massively power improvements as well as noticeably better throttle response. It also sounds fantastically aggressive, giving a very exciting exhaust sound during hard throttle. This downpipe can be paired to an exhaust of your choice, and enhances the sound and performance of any system.
aFe uses a unique 4" into 3-1/2" stepped design to increase exhaust velocity and the amount of usable torque. They also take advantage of heavy duty 3" 304 stainless steel flex tubes with internal interlock liners. This race down-pipe mounts in the factory location, mounting directly to the factory mount points and includes hardware for a hassle-free install.
It's 100% TIG-welded for strength and longevity. It doesn't just look perfect. It is perfect!
Factory O2 Sensor Locations:
Factory mounting locations for all O2 sensors.
OE style brackets are included for a hassle-free installation.
aFe down pipes are engineered and manufactured in AFE's 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.
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.
F30 / F31 / F34 (2012+) > 340i
F32 / F33 / F36 (2014+) > 440i