One problem related to manifold/header/muffler/tail pipe has been reported for the 1998 Dodge RAM. The most recently reported issues are listed below.
Consumer was having problems with the intake manifold. The intake manifold ruptured which caused the oil to be sucked out of the oil pan, after the repair was made on the gasket, the bearing on the crankshaft failed, prior to the failure the consumer noticed the oil pressure gauge did not register correctly.