THE EXHAUST SYSTEM SEPARATED BETWEEN THE TURBO AND THE PARTICULATE FILTER ON THE CUMMINS DIESEL ENGINE. THIS IS IN A SPARTAN RV CHASSIS. THE HEAT FROM THE EXHAUST LEAK DUE TO THE FLEXIBLE EXHAUST BELLOWS CAUSED EXTENSIVE THERMAL DAMAGE. SEE NHTSA RECALL 16V-313 AS THAT RECALL DESCRIBES THE PROBLEM EXACTLY.