So I have a 2006 3500, right now I have it straight piped. A few years back I removed the cat/resonator because I didnt have to worry about the smog, but now I do have to get it smogged (CA). During a move a year ago I some how lost it.
So I always thought I had a cat but then I started seeing things that said it was a resonator. I cant seem to find a definitive answer on which it was. Seems like for every post that says cat there is one that says resonator. Now that I have to buy it i want to make sure that I get the right part.



Thanks for the help guys.

 

Call some of your local area muffler shops, they may have some lying around form other owners...worth a shot and used may be cheaper than new...

 

Your 2006 definitely had a cat and it may have also had a resonator, but that would have been behind the muffler. Every truck from 04.5 up had a cat from the factory.

 

Great thanks for the help guys