T he General Electric GE9X is the largest aircraft engine ever built. The engine is based on the GE90, which is currently ...

Think your muscle car has a huge engine? You haven't seen anything yet. This is the largest piston engine ever made and the ...

While the GE9X is — without a doubt — the largest engine ever put on a plane; as of 2025, the sole GE9X-powered aircraft (the Boeing 777X) won't enter commercial service before 2026.

It's now regarded as the second-largest airplane engine manufacturer in the world, behind GE Aerospace alone. It has even made some of the most revolutionary engines that changed aviation forever.