McLaren fitted new engines to both its cars ahead of final practice and qualifying for the Belgian Grand Prix in order to increase its pool of fresh power units for future rounds.
In doing so the team is expected to incur a combined 105-place grid-place penalty between its two cars, but in reality that will just mean Jenson Button and Fernando Alonso will start from the back of the grid this weekend and have two new engines to use over the coming rounds.
