I bought 3" intermediate and crossover pipes from summit to finish off my exhaust system, but I've noticed something that I've been wondering about. At about the middle of the crossover pipe, the side seems to be indented in a bit. It is in a straight section of the pipe, and on only one side it is pushed in, stays in for about 4 inches, and then smoothens out again. It almost looks like it was crushed, but it doesn't seem unintentional. Is this normal?