The splitter can go forward to the front of the bumper. Draw a line from the bumper edge straight down to the ground and that's how far your splitter can extend. The fascia angles in at the bottom so my splitter extends probably 2-3 inches past the fascia at the bottom. I'm not sure of the exact wording as to how far back the splitter can go, but the axle line sounds about right. You're going to have to cut out holes and slits for things like the tension rods to get it back that far.

David