"It's amazing to see everything that's gone in to making this moment happen. It's pretty special."

Dungey's championship is a historic one for KTM, marking the Austrian brand's first title in the 450 Class.

"I knew we had the right people behind us and if anyone could do it, (Team Manager Roger DeCoster) and this team could," added Dungey. "We struggled at times, but as a team we worked it out and were able to overcome it. It took a lot of effort from everyone here and overseas. We had a god opening round and just kept making progress. I committed everything and winning a championship is paying that due. I hope this is the first of many more."

In the 250 Class, Red Bull KTM's Marvin Musquin of France raced to his first U.S. victory.

"This is my best result here," said Musquin. "I was finding good lines, and this track is really about technique. I (also) got two good starts. In the first moto, I was happy to follow Kenny (Roczen) and in the second moto I was determined to get a good start because I haven't been doing that this year. I kept thinking about the overall, because I knew Tomac and Barcia had trouble (in Moto 1). With Kenny and Ryan (Dungey) winning as well, it was a good day for KTM."

After a break in the action next weekend, the 2012 Lucas Oil Pro Motocross Championship will return with the 11th of 12 rounds this season in Pennsylvania. The Steel City National from Delmont's Steel City Raceway will host the world's best riders on Saturday, September 1.