Renault has elected to introduce its new Spec C Formula 1 engine for the Belgian Grand Prix, meaning both Daniel Ricciardo and Nico Hulkenberg will take grid penalties.
The firm hopes the minor upgrades to reliability and performance with the new engine will boost its competitiveness after a disappointing first half of 2019.
With Renault having already taken grid penalties for using new components, the changes to the internal combustion engine will mean a five-place grid drop for both drivers.
The change will be Ricciardo's fifth new ICE for the season and Hulkenberg's sixth.
McLaren also has the option of taking the new engine for this weekend, but has so far not confirmed its plans.
Speaking on Thursday about what his team would do, Lando Norris said: "We have the possibility to choose the new one, but if we do it obviously comes with the penalty and there's still a long way to go in the season.
"We haven't decided yet but if we want to use it we can. The decision will be made tomorrow."