Click here http://bit.ly/ValvolineMotorOil to find the Valvoline motor oil right for you! Thanks to Valvoline for sponsoring today’s video!

We tested our butt dynos to see how good we are at guessing horsepower.

Special thanks to everyone who lent us a car for this challenge:
  / heartbeat.la  
  / billco  
  / big__john  
  / jacob_yesnick_racing  
  / ratpache_  

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