Yep, I cut the pigtail off of my old 02 sensor, and soldered this up. After that I just needed to put it in a project box. Originally I was going to thermal epoxy it all down to an Xbox 360 heatsink I have, then normal epoxy over the connections and such to seal it up. My dad came up with this box, and since it's aluminum it'll cool it just fine. I think he got it at Radioshack, which is where I bought everything else for the project.