Well, I went to a local truck shop asking about mufflers again. He told me they had Fleetguard wich is made for cummins filtration. I knew that b/c of all the help you guys have given. I am curios to know if anyone has used it and what your opinion was or is. He also said it is the same as the Donaldson. What you guys think?

 

I have the donaldson 40" on my 05 and really like it.

 

Fleetguard and Donaldson both have good, comparable quality mufflers.