10 Sounds You May Never Hear Again...

Frankie said
Air Starters on the old Mack diesel tractors.

Agreed that was one bad *** sound, a friend years ago had fleet of R-700 dumps
very cool to hear them all fire up

[ame="https://www.youtube.com/watch?v=E1RLUxp3Gpo"]Mack R700 V8 Start up - YouTube[/ame]