How to increase the horsepower of a Vauxhall Astra?

I recently purchased a Vauxhall Astra and I am looking to increase its horsepower. What are some ways I can do this without damaging the engine or compromising fuel efficiency?

There are a few options to increase the horsepower of your Vauxhall Astra. One option is to upgrade the air intake and exhaust systems. This can improve the airflow to the engine and allow it to breathe easier, resulting in increased horsepower.

Upgrading the engine's computer chip can also help increase horsepower. This will improve the engine's performance and allow it to produce more power.

Installing a cold air intake can also help increase horsepower. This will bring in cooler, denser air to the engine, resulting in more power.