Cut the flared ends off your factory one, so you can slip them and the nuts over the 1/2" flexible copper. Bend the copper to the desired shape, slide the nut, then the flared end, then a feril over the end. Tighten it up, and you'll have a new EGR tube. The feril will seal the copper against the factory flared end and the flare will seal against the header and EGR. I've been running like that since September or October when I put my new engine in and it works fine, but I'll replace it once I get some new headers.