Jeep Cherokee Muffler Replace/Remove

I Have A '94 Jeep Grand Cherokee Laredo Inline 6 And Recently Noticed A Small Hole In My Muffler. I Went Underneath To Look More Closely And...

Last June I Had A New Oem Muffler Installed Professionally. After Driving For 45 Mins The Car Almost Caught On Fire. The Muffler Got So...