My A2Rs were a little tight to fit, but I didn't tighten anything up until I had all the bolts in place and it went just fine. I did have to put a little outward pressure on one of the flanges that bolts to the head, but it was fairly easy to do. The welds and bends looked fine to me when I unpacked it, and it's been working fine for a few months. I've already removed it and replaced it once to clearance it a little where my Addco swaybar was rubbing. No problems, sounds great.