1.High quality of SS, TIG welded, mirror polish 2.1.8mm thinkness for pipe,12mm thickness for flanges 3.Strict quality control Condition:AUDI 2.7L Exhaust SystemMaterial: SS201 or SS304 for header, downpipe and catback 6061 Aluminum for intake pipesAll exhaust tips in SS304, 1.5mm tube thicknessBeautiful weldjoint, flat Flange and clean air holesExhaust system in Mandrel Bend Piping with TIG ...