Looking to free up some HP on your European BMW Diesel? Check out Circuit Werks Latest BMW Diesel Downpipe! This Downpipe is designed with Ease of mind when it comes to a better flowing Direct Stock replacement downpipe! Our latest downpipe features a diesel particulate filter delete and a catalytic converter delete. This is to help maximize performance by removing the factory Emission related items that can be very restrictive on the exhaust system. While removing the emission related items, it will help to improve exhaust flow, Lower Exhaust Gas Temperatures as well as increase fuel economy and horsepower!
This downpipe is a direct stock replacement fit that removes the catalytic converter and particulate filter. It’s made from high quality T-304 Stainless steel that is mandrel bent and TIG welded. Also features bung fittings that are welded on for use of O2/lambda/ wideband/ EGT sensors as well as mounting brackets for a secure fit. If you do not need the sensor outputs, they come shipped with Bung fitting bolts to keep them closed. We recommend for best performance, fuel economy, and emission results, adjusting the factory tuning ECU settings, as well as turning the DPF cleaning cycle off.
This Downpipe will fit European models only (US specs have different flange setup on the exhaust side):
- Euro 635D E63 E64
This product was intended for off-road use only! May not pass state regulation emissions or smog.