If anyone wants to add a little flair to the backend of their Prius v, I would suggest a chrome tailpipe extension. You need to get the 2" diameter by 9" length. I bought mine at the local hardware store for about $4.00. Can't beat the price and really dresses up the tailpipe.
On a Prius I'd want to conceal the tailpipe as much as possible, not glorify it lol. In all seriousness though, just make sure it is not touching the bumper, there have been other users who have melted their bumper by adding on an extension which was too big. Other than that, if you like it that's all that matters in the end!