I have a 2006 CTD and was looking at the CAT deletes and the Muffler deletes. I am going to keep the stock equipment on hand to replace just in case I have to go to the dealer for warrenty work. Can anyone tell me what sounds best? No CAT No Muffler, or leave the Cat? Any recomendations? Thanks.

 

hummm sorry I didnt see this before... summit sells 4' 4" exhaust pipe for $14 bux...

 

I just removed the muffler and welded in 4" replacment pipe and left the cat. It sounds good. Can't really hear anything while crusing but with the foot down...