Just a theory but I'm also 100% sure it's true

https://lemmy.curiana.net/post/450159

Related: “A new study by Western University in Ontario says that if you’ve got a car with a modified exhaust system, odds are you’re a guy and probably also psychotic and sadistic.”

caranddriver.com/…/study-loud-exhaust-psychotic/

Study Says That People Who Like Loud Exhaust Are Psychotic

The study made some strong remarks about the kind of people who would modify their car's exhaust.

Car and Driver
this whole post should be in fuck_motorbikes