An absolute waste of money. We have coil packs right on top of the spark plugs. If you are looking for better performance, fuel efficiency, or a smoother idle, you won't find it here. All you are doing is adding resistance between the coil and the spark plug. Regardless of any hype Nology may try to sell you. Nology wires are a great upgrade for cars with standard wires. For cars with coil on plug designs, they are a step in the wrong direction.
If you are looking to dress up your engine bay, and you think that a cluttered set of wires will do that, these are your answer.
The xB doesn't use wires. It uses the Coil-pack on top of the spark plugs, eliminating the use of wires. So unless you are talking about a black box on top of a long tube, you do not have "stock wires".
Yes nology wires on the xB do nothing but make it look pretty. No one has had them long enough to say anything bad about them. Honestly save your money for something else unless you are trying to "dressup" the engine bay.