Downpipe Kit with 200CPI Racing catalyst for Ford Focus MK3 STmade out of high quality stainless steel 1.4301 (SS304)diameter before and after catalyst Ø76mm200CPSI EU6 Racing Metal Catalytic Converter100% perfect fit, replace OEMless thermal load on the turbochargermore power by reducing back pressuresignificantly more torqueweight: 5,7kg