Hondata

Although a little premature, what would be the cost associated with reflashing back to stock? I would like to order the reflash (very soon), but wanted to clarify prior to.

In the case of a leased car, what happens when you return the vehicle? is it possible for the ECU to be reflashed back to stock? obviously not by Hondata, but by the dealer. And are there any reprecusions?

I have read all the info. on the '05 reflash and have this question:
Is there any problems with running the stock exhaust? I already have the IMG and CAI. I realize that the "full potential" may not be achieved, but there is no mention anywhere about use of the stock exhaust.