Ok so i am going to get rid of my stock muffler and just have one welded in but the question is what diamater muffler do i need or the end's of it at that
Thank's for your help.

 

i also have an 07 1500 hemi and recently had my exhaust done. i believe that the hemi has 3in pipe if that helps at all.

 

Cool thank's what exhaust did you do

 

I had a catback system made by a local performance exhaust shop. They used the magnaflow muffler which sounds awesome on the hemi and bent the tailpipes out of 3in pipe. The tailpipes exit on an angle behind each rear wheel with 4in polished tips. Looks and sounds badass! Im going to post pics soon.