i have a 2006 4.2L V6 Regular cab F150 and it does not breath to say the least and i want to do a after market exhaust but i am not sure what to do either single in single out or single in dual out "looks better to me "

 

On my 03, I just had a SIDO glasspack put on. Local shop did it all for $228 with custom bent dual tailpipes exiting in the stock location on the right side and mirrored on the left side.