The K-PAX cars are built and maintained by 3R Racing in Englewood.
On the standing start, Pobst took to the dirt to avoid a collision with a Porsche.
"It was an unfortunate incident," Pobst said. "It put me off into the dirt and allowed a couple of cars to get around me before turn one."
Pobst's teammate, Alex Figge, started ninth and moved up to up to sixth place by the end of the first lap. On lap three, Figge got a punctured right front tire forcing him to pit and he ended 14th.
"The car was working great," Figge said. "I was alongside and passing one of the Cadillacs when the tire went flat. It was pretty hairy there for a few moments until I got it slowed down."
With his sixth-place finish, Pobst is not in fifth place in the drivers' championship. Volvo is in third place in the manufacturers' championship race with 14 points, trailing Cadillac (32 points) and Porsche (30 points).
"We still have eight races to go," Pobst said. "Some of those tracks will favor our cars and all the hard work the crew is doing will pay off."
The next race of the Pirelli World Challenge is May 11 at Mazda Raceway Laguna Seca, at Monterey, California.
For more information on K-PAX Racing visit: www.kpaxracing.com
For live streaming of the race go to: http://www.world-challengetv.com
For more information on World-Challenge visit: www.world-challenge.com