Can't stop the money train! Either adapt and get involved or watch it all go away. Money was paid to get the db level increased for this event, I'm sure more is paid when the historics run.
I'd be curious to know of the ten or so cars that had to adapt at the track, who is doing a more permanent fix?
Maybe we can all donate a tree to muffle the noise in the faster parts of the track
....or some can just run a different exhaust.
Dan