What are the best upgrades for my Ford Fiesta's engine?

I recently purchased a Ford Fiesta, and I'm looking to upgrade its engine for better performance. I am wondering what upgrades are available and which ones will give me the biggest bang for my buck.

For improved engine performance in your Ford Fiesta, I recommend upgrading to a more efficient air intake system and a high-performance exhaust system. These upgrades will allow for more air to enter the engine and for exhaust gases to exit more efficiently.

Another important upgrade to consider is a tuner or programmer, which can adjust your engine's fuel and ignition timing to optimize performance. You can also upgrade to high-performance spark plugs and wires for better ignition.

If you're looking for a significant upgrade, consider installing a turbocharger or supercharger on your Ford Fiesta. These will boost your engine's power and torque output, but keep in mind they can be more expensive and require additional modifications.