In The Garage

Heavy D's plan falls apart as he strives 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 a dangerous mini bike.

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 pedal 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 sends Diesel Dave and The Muscle on a secret late-night mission to the spooky overflow lot; however, completing their task becomes difficult when they remember all the builds they've done throughout the years.