Heavy D's plan falls apart when he plans to turn a Cummins-swapped K5 Blazer into a one-of-a-kind off-road showpiece with a matching trailer for a big client; Sam builds maybe the most dangerous minibike the world has ever seen.

The Diesel Brothers complete their transformation on an old K5 Blazer and square body truck bed into the ultimate diesel-powered party on wheels; Diesel Dave convinces Heavy D to give his El Camino what it needs to get back on the road.

Heavy D puts the petal to the metal on his next SEMA build, a 6x6 with a custom full-track assembly that can handle any terrain in style; Diesel Dave puts finishing touches on his dream El Camino before revealing it at Monster Jam.

"Heavy D" has plans to convert a Vietnam-era bridge boat into a diesel-powered surf boat; the guys head to California to track down a rare Excursion to use in their next giveaway.

Heavy D is in deep with his diesel-powered boat conversion, and he's on the verge of seeing his dreams sink; the race is on to get their mega trucks in working order before the epic showdown in the Pit against the Dirty 7.

The Diesel Brothers celebrate Memorial Day and salute the men and women of the armed forces the best way they know how: epic builds, special celebrity guests and a crazy stunt to cap off the night.