whitch converters for a 01 dodge 5.9?

[Tyler]

i have a 01 dodge and it comes stock with one converter i have straits runnning threw it and i cant run true dual threw it cause i have one i want highflows should i get the 01 dodge with the dal in and single out or could i buy some other highflowsdoes it matter what its for cause i really wanna buy some other kind cause i wanna run true dual help thanks