I've got an '04 Durango 4.7 with around 131K miles on it, and was wanting to get the entire exhaust system redone. After 17 years, I'm sure the cats are going to go out soon. I'm wanting cats and mufflers that are a good bit more free flowing than OEM spec, but I don't want something too loud and aggressive. I think I will also being running Hedman Shorty headers as well, I'm just hoping the AWD won't affect the fitment of them. Any recommendations for mufflers and cats I should get? Just wanting a little more power and economy out of it.

 

Magnaflow.