Hi Mario:
I'm not a tech but I just had my flex pipe replaced. Hyundai wants $150 for the part and another $150 to put it in. I had my mechanic swap out the flex portion of the pipe and replace with some flex pipe and bridge the gap with new pipe. The whole tailpipe assembly with the flex pipe is how Hyundai sells it. The one thing I can tell you without a doubt is do not replace with non-flexible pipe. The engine moves and that is why it needs flexible piping. I think a couple of ring clamps (the thing with the screw and threads that makes the circle tighten like on your radiator hose) and a piece of flex pipe should solve your problem. You also may want to clean all the connections on the O2 sensors. I replaced O2 sensors and MAF only to discover that it was the flex that was setting off the CEL. Didn't make sense to me since it was the sensor before the flex pipe and not the one after but that fixed the problem. All the best.
Freddy
