The Black Mamba decat downpipe for the Z16LET engine of the Opel Corsa D OPC 07-09 is made from high-quality T304 stainless steel, mandrel-bent and TIG-welded 2.5" / 63.5mm pipework, fitting without modification from the turbo to the front pipe.Direct bolt-on 100% T304 grade stainless steel Aggres..