Underride Protection - too heavy?? Recommended?

[autoque]

I sort of decided to get the underride protection over the aerodynamic kit for the sake of functionality, since underride protection can actually stop debris and stone chippings etc.

But I just have no idea how heavy it is. I'm getting the 3.0is engine and I don't want it to drag around too much extra weight. If it's like 100kg or 200 pounds, then it's probably not worth having it, since it will affect the accleration and fuel consumption.

Anyone has any idea how heavy that thing is?

I'd like any suggestion on the underride protection. Thanks.