Factory exhaust pipe size

[TF360]

What diameter pipe came on 1973/74 318 dusters from the factory. What about the 340/360 cars.

 

[71DodgeDemon340]

Probably around 1.75 i cant imagine them using anything smaller from the factory

 

[ir3333]

good question.The early 340 cars were 2 1/4" to the muffler and the tailpipes were 2",
idea being that the exhaust would have cooled by the time it reached the exit...

 

[71DodgeDemon340]

Also depends if it was a single exit exhaust or not