How loud is it compared to magnaflow?
I haven't heard the magnaflow, maybe someone who has heard both could chime in. Regarding the corsa, i have only heard one in person, and that was on a 08 escalade. Simply put, it sounded great in the cab, wasn't terribly loud at all, and under acceleration is sounds super mean. After hearing it on the escalade, my gibson exhaust on my tahoe sounded like it was stock. And i was very happy with the gibson.
I am having my corsa put on this weekend, and can get some sound clips up. However, there are plenty of videos on youtube.