First off, let me start by saying I'm not the first person to make a video on replacing injector O-rings for a 7.3 Powerstroke, and I won't be the last. I replaced these O-rings because I thought it was the main cause of reduced high pressure oil in my truck. It took about a week to finish the job and once it was all done, I was pretty disappointed to find out that it still didn't fix the main issue on my truck. I'm not giving up quite yet, but I'm running out of things that could possibly be wrong. Thanks for watching everyone!