It is hoped the changes will help promote closer racing on track, reducing the ‘dirty air’ which caused issues in recent years.
Mercedes had dominated during the hybrid era, winning eight consecutive Constructors’ Championships.
But Red Bull pulled closer than anybody last season with Max Verstappen pipping Hamilton to the Drivers’ Championship.
F1 pre-season testing gets underway in Barcelona next week, giving teams the first real chance to understand how their cars fare against others.
Ferrari and McLaren have been tipped to close the gap to Mercedes and Red Bull, but nothing will be clear until the first race of the season in Bahrain.