Downpipe Brondex BMW M140I M240I 340I 440I • Improved Exhaust Sound;• Improved Power;• Diameter 3,5 inch (89mm), wall thickness 2mm;• Complete high-quality stainless steel (AISI 304);• Double-sided welding of flanges and most loaded joints;• Oxygen sensor ports by standard scheme;• 100% OEM fit, easy to replace factory part;• All the necessary fasteners are in set;