Ultimate Car Build-Off

Hollywood Hot Rods and Pure Vision are given four days to turn a minivan into a supercar to be raced at Willow Springs Raceway.

Speed Unlimited and Hollywood Hot Rods transform hearses into hill climbers.

Teams compete to turn a Firebird into a flying car and cover the greatest distance taking off from a 200-foot cliff.

Team Z Motorsports and Alternative Automotive Technologies put the front halves of two different cars together to make one that can drive in both directions.

The teams are tasked with creating one four-wheel vehicle, capable of pulling long wheelies, out of two motorcycles.

The Detroit semi-finalists face off by turning their trucks into tanks.

Underwater vehicles are built from electric golf carts.

The semi-finalists turn their personal water vehicles into hovercrafts to try and advance to the national finals for a chance at $100K.

Vehicles are turned into stealth spy cars, complete with rockets, spikes and smoke.

The three city finalists have to make a car or truck that drives on water, with the winning team walking away with the grand prize of $100,000 and the title of top garage.