It is his ambition to become NZ's first professional Nascar driver, the leading motorsport formula in the country and watched all around the world.
It has been a long, hard road leading up to the three-week tour which has included diligent fundraising involving the entire family, with sausage sizzles the general event of choice.
"After six months of hard work fundraising, the day has finally arrived for packing bags and getting ready to fly out on Sunday," Carolyn McLean said.
Thomas' first race meeting will be at Quincy, Illinois on April 14-15, and the second meet is scheduled for April 21-22, at Springfield, Illinois.