I have a recently purchase Pro-Tec pipe for my SJ, the guy I bought it from told me about the crack and I looked at it before I purchased it. He said (and from looking at it I figured he was right) that the crack was cosmetic and would not effect it in anyway at least he thought. I was bored yesterday and decided to pull my exhaust off and get this one ready to put on and I figured I would check it first to see if I could tell if I should have it welded. Long story short when I put my air compresser nozzle up to one of the cooling inlets and plugged the other it flowed free straight through the crack. So my question for you guys is should I try and have it welded or just get my money back? The crack is about 3" long on the mid pipe.