What may be even more surprising, however, is that these massive noise-making behemoths were powered by Chrysler HEMI engines. The Chrysler Air Raid Siren was a hulking beast that was 12-feet long ...

Chrysler made the air raid siren with the 331 Hemi, and my goodness is this thing loud. It's capable of discharging 2,610 feet of air per minute at seven PSI. It was powerful enough to blast birds ...