Eisenmann Racing Catless Downpipes - F8X M2/M3/M4
Zero restriction downpipes are lighter and make more power for the track
The factory catalytic converter on the F87 M2 Competition, F80 M3, and F82 M4 is very restrictive and robs a lot of horsepower and torque but works great for cleaning the exhaust gases. However, on a track/racing car that no longer needs the catalytic converter so removing it makes sense. The factory S55 catalytic converter is very dense and impede exhaust flow. By deleting the cat the turbos can spin more freely and with less strain. This not only makes more power and torque but helps the turbo last longer. Removing the cat also saves quite a bit of weight. This racing downpipe can be used on its own, however, a check engine light and fault codes will occur.
The Eisenmann Catless Downpipe has more well-thought out features and design than any other S55 downpipe we have seen. It's a full stainless steel body and wrapped in heat wrap. Eisenmann used the latest CAD technology to digitize the stock downpipes and replicate their layout and dimensions in their new design. Flanges and fixture points are laser cut and CNC machined and TIG welded to ensure precise fitment on every part. Other high volume and cheaper downpipes do not have the level of precision we have seen on the Eisenmann DP. This downpipe is used with the factory gaskets, hardware, and sensor bungs. 304 stainless steel is used throughout.
This exhaust section is built to order and ships from Eisenmann's factory in Germany. Typical delivery time is 5-7 weeks after ordering.
Notice of Fault Codes/Check Engine Light - Using any Racing downpipe could result in a check engine light and fault codes, even with metallic 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.
F87 (2016+) > M2 Competition S55 (2019+)
F80 (2015-2018) > M3 (2015-2018)
F82 / F83 (2015-2020) > M4 (2015-2020)