It will have built in cooling channels. This is the version of the Raptor engine which wil be produced by the thousands. The Texas Starbase will eventually be able to produce one hundred Starships and Boosters per year. This will need about 4000 Raptor engines per year. There will eventually be other SpaceX facilities that will enable about one thousand Starships and boosters per year. This will need 40,000 Raptor engines per year.

Elon talked about eventually getting the SpaceX engines to 330-335 tons of thrust per engine. This will mean 33 SpaceX raptor engines will give Starship triple the thrust of the Saturn V. In expendable mode, the Starship will be able to deliver 400-500 tons to orbit.