I finally got it off last night. I started this project(replacing header) at 6 pm thought it would only take a couple of hours. I ended up finishing it at 3am!! It was soooo hard taking off the bolts. I broke a couple of 12mm sockets, so I had to stop my autozone a couple of times(thank god they are open 24/7). But i finally got the stock header off and faced the difficulty of the o2 sensor...i tried everything and I posted on here and found out that you can actually get a socket to remove the o2 sensor. So i stopped by autozone and I rented one for 15 bucks and I got home expecting it to be really easy. WRONG!! I was hitting the rachet with a hammer to try to losen it and it still wouldnt budge. So I got mad now and I was about to call it quits for the night until I tried it one more time, not even hitting it hard with the hammer and it came loose!! MAN was i relived, so put it in the DC sport header and put everything back on, gave it a test drive later that morning. Even though I have a DX and a auto I feel a big difference adding the header with my exhaust and intake. Not that much louder either.