Junkyard Wars - Season 4

In this episode, each team has to build a light weighted vehicle which has to be able to participate in a race through a 3-lap mud course. Contestants 'Model Ts' vs. 'Detroit Muscle'

In this episode, each family team has to build a powerful boat which has to be able to hit another boat and withstand it. Then, the vehicles will be tested in a competition that consists in pushing the enemy boat out of a "battle circle". Contestants "Kentucky Fried Family" vs. "Morterheads"

Teams from two New York City boroughs build paintball-firing tanks to out-gun each other.

Each team has to build a 'Collapsible Car'. The car should fit in 4 small valises. Then, they will test the cars in a race, but both cars experienced technical problems...

Each team has to build a submarine that has to be controlled by a man inside of it. Then, the submarines will be tested in 3 races. The team that wins 2 races advances to the next round. Contestants 'Custom Cruisers' vs. 'Model Ts'

In this episode, each team has to build a "Railroad Racer", a vehicle which is able to race through the train rails. Then, the vehicles will be tested in a competition which consists in dropping a load in a section of tracks before reaching a barrier. Contestants: "Kentucky Fried Family" vs. "Brooklyn Benders"

In this episode, each team has to build a one-man "hockey car". Then, the vehicles will be tested in a huge hockey match where the cars have to hit the giant puck into a huge hockey net. Contestants: "Kentucky Fried Family" vs. "Custom Cruisers"