Two problems related to manifold/header/muffler/tail pipe have been reported for the 2001 Ford F-350. The most recently reported issues are listed below.
Spark plugs blew out? truck is now sitting at the Ford dealership. I have only owned this truck for 8 months and have never heard of anything like this happening on any vehicle prior to this.
Faulty exhaust manifold bolts break off and cause excessive noise, exhaust enters the drivers cabin, vehicle will not pass emissions inspection and is expensive to repair. I have 4 Ford vehicles with this problem. First incident was at around 50,000 miles and 48 months after purchase. Ford refused to make repairs under any portion of the factory warranty. They claim lifetime emissions warranty doesn't cover it, nor the 100,000 powertrain warranty. I have spent over $8000. 00 making repairs to these exhaust manifolds. Triton v-10 gas engine.