Racing Catless Downpipes

The Eisenmann Racing Catless Downpipes are engineered as a zero-restriction replacement for the factory catalytic converter on F87 M2 Competition (2019+), F80 M3 (2015-2018), and F82/F83 M4 (2015-2020) models equipped with the S55 engine. The factory catalytic converter is known for its density and restriction, impeding exhaust flow and robbing the engine of significant horsepower and torque. By removing this component, the turbos can spool more efficiently with less strain, leading to improved power output, increased turbo longevity, and substantial weight reduction. Constructed entirely from 304 stainless steel, these downpipes utilize advanced CAD technology for precise replication of stock layout and dimensions. The flanges and fixture points are laser-cut and CNC machined, with TIG welding ensuring accuracy and durability. It is important to note that installing a catless downpipe will likely result in check engine lights and fault codes, even with metallic cats. Use on a public highway or any vehicle subject to emissions inspection is prohibited. To optimize performance, prevent fault codes, and improve drivability, a specific race software tune is strongly advised. BimmerWorld recommends Epic Motorsports Race software for these tuning goals. BimmerWorld reserves the right to verify customer eligibility for this racing product, potentially requiring proof of a racing license, track participation, or a dedicated race car build. Orders not deemed for legitimate racing purposes may be canceled. Additionally, please be aware that this item has been discontinued by Eisenmann and is no longer available.