Anyone know off the top of their head what the size of the cap you need to block off the EGR is? I've been pouring through the search function, and it seems some people did it with just a cap, and some people say you need a special cap. I had a cap on it a while ago, but it didn't really fit, and long story short, I lost it somewhere... If you know the size, or better yet, have a cap or a broken EGR tube with the nut on it, I'd love to take it off your hands...