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Vacuum cleaner racing live on Periscope: https://www.periscope.tv/w/1eaJbwEvRmZxX

I saw that teams were resorting to welding in whistle tips to pass the draconian noise test.
https://i.ytimg.com/vi/zUXow3d3-b0/hqdefault.jpg

I wonder how the course workers feel about them as...

http://drscca.org/livetiming/fsae/autox/