Season 5 Episodes8
Cast2

David Sparks
Heavy D

David Kiley
Diesel Dave
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The Diesel Brothers continue transforming their junkyard Bronco into an off-road beast for the Tuff Truck rematch against the Goons and Welder Up. Meanwhile, Heavy D customizes a brand new UTV so his friend can break a world record at the live event.

David Sparks
Heavy D

David Kiley
Diesel Dave
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"Prepare for Liftoff" is episode 7 of Diesel Brothers season 5. It aired on May 20, 2019.