aFe Power has developed a high-flow downpipe for your N55-equipped BMW, complete with a high-flow catalytic converter. Utilizing a 2.5" to 3" stepped design, this downpipe is dyno-proven to make 14 horsepower and 39 ft. lbs. of torque! Constructed of mandrel-bent brushed 304 stainless steel, this TIG-welded downpipe is sure to perform as good as it looks for years to come!
This Part Fits the Following Vehicles