#DieselBrothers | Mondays at 10/9c on Discovery Full Episodes Streaming FREE on Discovery GO: https://www.discoverygo.com/diesel-brothers/ The team heads to the racetrack to test Chavis's performance truck, The Reaper, before The Ultimate Callout Challenge. Subscribe to Discovery: http://bit.ly/SubscribeDiscovery More Diesel! http://www.discovery.com/tv-shows/diesel-brothers/ Join us on Facebook: https://www.facebook.com/Discovery Follow on Twitter: https://twitter.com/Discovery Check out the #DieselSellerz: http://www.discovery.com/tv-shows/diesel-brothers/dieselsellerz-business/