MOTORTREND HD

Diesel Dave continues working on his epic modern-day Kodiak while making sure he doesn't break the bank; Sam the Mad Scientist unveils The Kraken; a diesel-powered monowheel vehicle that is unlike anything the guys have ever seen.

Joe Martin is ready to upgrade a special car in his collection, a '60 Impala that's been collecting dust for nearly 25 years; Joe and the guys get to work, but with a new X-frame and engine comes a lot of problems.

Joe gets to work on upgrades to his '60 Impala with a new frame and engine; Mandi selects a '49 Buick to sell to fund the build, and Uncle Bill helps to get it sale-ready; it's time for Joe and Mandi to check out the updated ride with its new stance.

Danny and Penny Cobbs own an award-winning '55 big-window truck, but it doesn't run; they need Joe Martin to get this showstopper on the road; the team plans an engine swap and some other cool updates, including a killer, new set of wheels.

Mandi and Shag have a lead on a '70s step van, which Joe and the team will transform for a fan's whiskey business; the crew must find a new hood for a '54 Chrysler New Yorker wagon that matches the fit, paint and patina of the original.

Joe and the team continue transforming the '70s step van into a rolling billboard for a whiskey company; the body gets an extreme makeover; Joe works on the van's artwork; a local customer stops by for some help on his 1950 Chevy pickup truck.

There's a change of plans for the Whiskey Van; the owner wants to auction the van off at Mecum and donate the proceeds to St. Jude's Children's Hospital; Joe and Mandi are excited by the idea, but only have five months to finish the van for auction.

A couple travels from Missouri with a 1936 Ford Coupe that's been part of their family for a decade; it needs a new frame, motor and lots of repairs; Mandi and Shag get their hands on a 1960 Impala they want to flip for a quick profit.

Joe and Bryan work on the '36 Ford Coupe; with new wheels, lift-off hood and custom interior, the owner has waited decades to drive her family's heirloom, and the time is finally here; a couple returns with a '67 Chevelle to add even more horsepower.

Joe and Mandi have a surprise for Pompa; Joe and Mike tackle the rebuild, all while trying to keep things under wraps; Joe has a neglected Ferrari in his collection that he wants to get on the track.

Joe and Mike work hard on the surprise bike for shop assistant, Pompa, a Harley Fat Boy with a green, mean Joe Martin touch; Mandi and Shag have a cherry '56 Continental from Joe's collection that they're ready to sell to a lucky buyer.

Joe and Bryan work on the '36 Ford Coupe; with new wheels, lift-off hood and custom interior, the owner has waited decades to drive her family's heirloom, and the time is finally here; a couple returns with a '67 Chevelle to add even more horsepower.

Joe and Mandi have a surprise for Pompa; Joe and Mike tackle the rebuild, all while trying to keep things under wraps; Joe has a neglected Ferrari in his collection that he wants to get on the track.

Joe and Mike work hard on the surprise bike for shop assistant, Pompa, a Harley Fat Boy with a green, mean Joe Martin touch; Mandi and Shag have a cherry '56 Continental from Joe's collection that they're ready to sell to a lucky buyer.

A couple travels from Missouri with a 1936 Ford Coupe that's been part of their family for a decade; it needs a new frame, motor and lots of repairs; Mandi and Shag get their hands on a 1960 Impala they want to flip for a quick profit.

Joe and the team continue transforming the '70s step van into a rolling billboard for a whiskey company; the body gets an extreme makeover; Joe works on the van's artwork; a local customer stops by for some help on his 1950 Chevy pickup truck.

There's a change of plans for the Whiskey Van; the owner wants to auction the van off at Mecum and donate the proceeds to St. Jude's Children's Hospital; Joe and Mandi are excited by the idea, but only have five months to finish the van for auction.

Mark Worman and his gang of garage ghouls work to bring some of the most wrecked muscle cars back to life.

This '69 Hemi Charger is a dream build, where the owner created a classic from the ground up; it has things like AC that weren't possible from the factory, plus leather, six-way seats, deep-black paint, and a camshaft that goes bump in the night.

The guys add V-8 power to their 1971 Plymouth Duster, whose seized slant-six had seen better days; with some other repairs, the guys get the Duster back on the road and rescue another vehicle from themselves.

Influencers taking on Eric Malone from "Fastest Cars in the Dirty South" in grudge races; Freiburger and Finnegan head in reverse by trading a clean duster for a worse car.

Steve has only driven his prized 1969 Camaro Z28 at five miles an hour, but he wants it to be a muscle car beast; Scott owns rare matching numbers 1964 Corvette that he wants to be brought back to life.

Walter loves the fast and futuristic look of his 1975 Bricklin, but the car drives like something from the dark ages; Dan restores a 1963 Split Window Corvette for his Uncle Carl and Aunt Claire.

Mad Scientist Sam's wild creation, the Kraken, comes to life, but Heavy D continues to be skeptical of the build's potential viral success; a high-profile client wants to customize a Ram 3500, which puts Diesel Dave and The Muscle to the test.

Heavy D surprises the mechanics with his build: a tank; he has big plans for the beast, but must first find a new engine and get it moving again; Heavy D, Diesel Dave and the Muscle personally trick out their latest giveaway truck.

A 1937 International Harvester gets a big old Cummins 12-valve diesel engine that's as heavy as the truck itself; a 2005 Chevy Colorado gets a new lease on life as a nitrous-infused drag truck.

A 1996 dump truck is the largest truck the shop has ever customized; the guys go extra heavy duty to create a military-styled megatruck; a lowrider enthusiast wants a custom air ride and LS swap for his pristine 1934 Buick.

This year's over-the-top build has Bill and crew lifting a 2020 Chevy Silverado 5500 more than a foot with a custom heavy-duty air suspension; the guys also prove their Texas mettle by radically overhauling the utility bed.

Hall of Fame running back Earl Campbell arrives with the body and parts of a 1949 Cadillac, and the crew is honored to create a ground-up build for the local legend; a 1940 F-100 build snowballs into a much bigger job.

Competitors strap in for the fall mud circuit in the gritty underground world of mud racing; with big money on the line, no one is holding back.

Racers gear up for one of the circuit's wildest events: the Rednecks with Paychecks Fall Mud Crawl; Bryce Sparks sends it to win his daughter a new UTV; Randi fights to overcome a traumatic accident with a victory; Two new drivers ignite a rivalry.

At Arkansas's Greasy Bend Off-Road Park, rivals Bryce and Josh wager big money on the small tire bounty course; Larry calls up an old friend to help him turn his season around; AJ does whatever it takes to take down his top competition.

Larry and Bobby enter a wild trail race, using questionable tactics while chasing their first win; Bryce dresses to impress and risks it all on the ATV short course; Randi takes on Megan Rion and skimmer A.J. Robinson in the Bounty Hole races.

Bryce looks to defend his title against his nemesis, Josh; things quickly get out of hand, ending with a broken rig and a bruised ego.

The Josh Carmon vs. Bryce Sparks rivalry heats up as they line up for the final event of the fall mud circuit; AJ debuts the largest ATV in the world just in time to face Larry Oakes and Megan Rion in the season's nastiest bounty hole.

Larry and Bobby enter a wild trail race, using questionable tactics while chasing their first win; Bryce dresses to impress and risks it all on the ATV short course; Randi takes on Megan Rion and skimmer A.J. Robinson in the Bounty Hole races.