Verstappen and Leclerc will start from the back of the grid.
Two of the world's best drivers will be reprimanded for using too many engine parts.
McLaren's Lando Norris and Alpine's Esteban Ocon are among the others.
Leclerc and Verstappen were in second and third place.
George Russell was fourth in the car race.
Kevin Magnussen's car broke down on the run between the La Source hairpin and theEau Rouge sweepers and it took a red-flag period to recover it.
Verstappen was quicker than everyone else for most of the session, after running soft tires early on, before being overtaken by the Ferraris.
Leclerc was going to go top before he slid at the final chicane.
Russell was 0.858 seconds off the pace while trying a significant aerodynamic upgrade and Verstappen was 0.217 seconds off the pace.
The session ended with Lance Stroll fifth from Alex Albon and Daniel Ricciardo, who will leave McLaren at the end of the season.
Lewis Hamilton was ninth fastest, followed by Red Bull'sSergio Perez.
All Rights Reserved © 2024
