When the frame on Heavy D's "quick flip" is unsalvageable, he decides to turn it into the ultimate mud truck. Chavis gets more than he bargained for when he's invited to bring his custom race truck to the Call Out Challenge truck competition.

Heavy D, Diesel Dave and the Dieselsellerz crew work to finish their epic monster mud truck for the giveaway, and The Muscle scrambles to find a buyer for the flashy Denali he bought without Heavy D's permission.

Sick of the ridicule on social media, Heavy D decides to finally finish the "Fail of the Year" UTV. And the gridiron comes to the garage when NFL legend Marshawn Lynch asks the guys to build him a Beastmode UTV.

When Redbeard challenges Heavy D to repurpose some old inventory, Heavy decides to marry a stretched 6 door F650 with a camper to create the ultimate expedition vehicle. And the guys buy a Hummer H1 from a mysterious mountain man.

Heavy D, Diesel Dave and the Dieselsellerz crew scramble to finish a six-door stretched F650 Expedition Camper for a big client. And Heavy D shocks the team with his latest flip- a diesel-powered experimental helicopter.

The Diesel Sellerz pick up a vintage fire truck to transform into a tow truck that can carry everyone in the shop. But before they get into the build, legend Chuck Norris comes to tap them for a truck for his latest project.

The Dieselsellerz pick up a vintage fire truck to transform into a tow truck that can carry everyone in the shop. And Heavy D is determined to finish the endless Fail of the Year UTV build.

The Diesel Brothers are up against the clock for their SEMA build: a replica Ford Bronco made from an F350 and an Excursion; Heavy D brings in physics help to make his dream of a somersaulting truck come true.

The Dieselsellerz SEMA build hits a snag, and the guys scramble to find a replacement. They decide to rebuild and give away their most iconic build: The Megaram.