Exhaust tip inlet size

For some reason, Ma Mopar decided to stuff exhaust tips INSIDE the tailpipes. I always thought that was strange. I don't know how much of an affect that would have, but it seems to me that choking a 2.25 inch exhaust down to 2.0 or slightly less could not have been good. I bought some stainless steel replica tips for my 69 Barracuda that slip over the tailpipe and look just like the originals. I doubt that the restriction affected the exhaust note.