The EGR tube is not in that pic, that diagram only shows the MSP specific parts and the EGR tube was a carryover from regular protege.
So it is an egr tube? I cant seem to locate it on rockauto and i have not tried asking any of my local auto part stores yet. Thinking of just asking mazda. Thing is the nut on it, the threads arejacked and arent sealing tight unto my exhuast mani.
^just be careful how u route it. Make sure that tube doesn't touch anything else especially the wire harness. I've learned the hard way when mine shorted out my harness. I have since deleted my egr system(no emission standards in Hawaii).