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.

Heavy D decides to test the physics abilities of the shop and build a somersaulting truck to use for viral videos. And The Muscle takes over a flip from Heavy D and turns a Dodge Ram into a badass modern pop-up camper.

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.

The Diesel Brothers attempt to dieselfy a Prius, try their hand at bull riding, and almost lose Chet in an unfortunate dolly race.

Heavy D, Diesel Dave and the Dieselsellerz crew work to reinvent the bullpen car for MLB Network, while working on their biggest commission ever- a Chevy Duramax for baseball legend Miguel Cabrera.

The pressure's on when Detroit Tiger and baseball superstar Miguel Cabrera taps them to build a tricked-out Chevy Duramax for his charity. And the guys try to knock it out of the park with National League themed UTV bullpen car for MLB Network.

The Muscle and Diesel Dave rewrite Heavy D's autobiography, Heavy D takes the Megaram out on a rescue and ends up stuck in the mud, and Heavy D and Diesel Dave need Redbeard's help when their latest build breaks down in the middle of Salt Lake City.

Heavy D, Diesel Dave and the Dieselsellerz crew scramble to finish an F100 race truck in time to race the legendary Mint 400, and Heavy D has the biggest giveaway yet- of the Mighty Megaram.

The Dieselsellerz are pulling out all the stops to completely rebuild the Super Six for a client, and Diesel Dave leaves the nest- with a wife, a baby, and his very own client build- a 6.7 Powerstroke F450 Superduty built to tow anything.

The Dieselsellerz are pulling out all the stops to completely rebuild the Super Six for a client, and Heavy D faces a challenge when his neighbor asks him to turn a 5-ton military truck into a snow-demolishing plow.