I just watched that video and the soundtrack seems really alien to a 500, hearing it sing to those high revs, it sounds just like we’re all used too but when he hits the throttle! Nice looking exhaust on that car, and it obviously works well.
I posted the link because of how neatly the exhaust installation had been executed.
I suspect the sound is probably better in real life. I've never had much joy with recording exhaust sounds, never sounds realistic, same with many other YouTube videos I've listened to. Maybe you need professional equipment and a 'soundman' to get it right?
Would love to know what mods were done to this engine. Ticks-over really well, unlike many tuned engines, yet revs up to 7k!
AL.