Yes, they do. All of the fuel and oxidizer goes through injectors to atomize it as it is sprayed into the combustion chamber. For a Merlin 1D, that’s about 340

Yes, they do. All of the fuel and oxidizer goes through injectors to atomize it as it is sprayed into the combustion chamber. For a Merlin 1D, that’s about 340 pounds of propellant going through the injector plate every second. Rocket Fuel Injectors - Things Kerbal Space Program Doesn't Teach https://www.youtube.com/watch?v=aa4ATJGRqA0 https://www.youtube.com/watch?v=aa4ATJGRqA0