Modified Tractor Griffon Growl WWII V12 37L with 5000HP at Iowa State Fair

A few photos and video of the "Griffon Growl" Modified Tractor's first pass at the Iowa State Fair on August 16, 2023. Owned and driven by Doug Voth, the Griffon Growl modified tractor uses a 37 liter (2,240 cubic inch) Rolls Royce Griffon engine from a WWII Supermarine Spitfire fighter plane. The supercharged WWII-era V12 produces over 5,000HP and pulled the sled 300+ feet.
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