I'd love to have that guy's devotion and concentration to build such a beast.
I love reading the comments

Anyone with an actual 911 engine running carbs or MFI will tell you that's very similar sound to what one sounds like running megaphones or headers and no muffler.
Heck my old carb's 2.0 4-cyl sounded like a dragster when I ran it with no muffler just to see what it sounded like.