Downpipe Kit with HJS-ECE-300CPSI Racing catalyst for BMW M140(x)i M240i 340i 440i & 540imade out of high quality stainless steel 1.4301 (SS304)complete Ø3,5 and adapter for stock exhaustHJS (ECE approval) 300CPSI EU6 Racing Metal Catalytic Converter 100% perfect fit, replace OEMless thermal load on the turbochargermore power by reducing back pressuresignificantly more torque
