My Cherokee is currently in annual. All looked really good until today. Cracked exhaust pipe on cylinder #1. Photo below. Question is, what’s the fastest way to fix it. Weld it? Replace it? Upgrade with power flow system? Also, on that topic, this crack looks super clean. How could that happen? I didn’t notice anything performance wise, cabin heat didn’t turn my carbon detector black, all seemed to be working just fine and I was flying as recent as three days ago on a long x-country. I do lean aggressively which shows pretty hot egt but I only have one egt gauge so I can’t really tell what each cylinder reads.