Features: 1) SS304 stainless steel pipe and low carbon flange with TIG weld 2) Mirror polished 3) Precise cast flange (or CNC machined and laser cutting machined flange) 4) With gasket and bolt 5) High performance header for 98-00 BMW E46 M3 3.2L 01 02 03 04 05 6) Accept customized orders to meet your specific requirements