I'm not sure I would have gone rectangular but I love the fact that you did it and applaud you for it. One of my biggest design complaints on the new Pilot is they got rid of the exposed exhaust tips from the 2nd gen. Even a single tip or single pair on one side of the vehicle would have been perfect.
Another user just created a thread (and I would like to know)... how much did this cost for you to do? How far back did they go with the custom work, just in front of the spare tire or did you do a whole custom setup?