What is the best exhaust system for a Ford Fiesta ST?

I am looking to upgrade my Ford Fiesta ST's exhaust system and I am wondering what the best option is for performance and sound. I want something that will give my car a deep and aggressive growl, but also won't be too loud or raspy. Any suggestions?

Based on personal experience, I would highly recommend the Borla Cat-Back Exhaust for the Ford Fiesta ST. It provides a deep and aggressive tone while also increasing performance and horsepower.

I've heard great things about the Magnaflow exhaust system for the Ford Fiesta ST. It's known for its deep sound and improved performance.

I would suggest taking a look at the Ford Performance Exhaust for the Fiesta ST. It's specifically designed for this car and provides a great balance of performance and sound.