Plenty of room for O2 sensor. I ordered a plug until I get FiTech operational to plug up bunghole. I have been playing around with height, trying to figure out which is best. If Im parallel on a bubble gauge to the pipes, they seem way too low. Here it is raised about 2 inches in rear. I struggle a little about where to hang it, I really dont want to put any more holes in the floorboard if possible, but also dont want to hang the exhaust in the same place I had hung it before, which was in the rear axle area. I saw someone had run bolts into the rear seat belt holes, I think this might be the route I go, since I probably wont be putting the rear seat belts in anyways. side view, really isnt hanging down too bad. I would like for it to be tucked up more, but 3 inch exhaust is tough to hide.