Season 5 Episodes8
Cast2

David Sparks
Heavy D

David Kiley
Diesel Dave
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Heavy D continues trying to salvage a wrecked overland camper from Europe, hoping for a big payday; Sam designs a hub-centric, diesel-powered bicycle with spare and salvaged parts from the shop.

David Sparks
Heavy D

David Kiley
Diesel Dave
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"Failure to Launch" is episode 5 of Diesel Brothers season 5. It aired on May 6, 2019.