Right have ordered my decat from ths performance (mine has give up at the flange weld) which states 2x oxygen sensors, I have checked my cat and am positive it's only the one being the upstream sensor I've felt all around the bottom of the cat and looked at were the connector is for the upstream and followed them and still no downstream sensor. So my question is does my 1.8TQS AJL have just the one sensor being the upstream and my decat will have to be blank plugged ?? And I presume it's AEB, AWM and APU's etc that have 2x sensors ??