Brumbies captain Ben Mowen hailed his back-line after Friday's 41-23 victory over the defending champions, the Chiefs, in Canberra.
In the first meeting between last year's finalists, the Brumbies ran in five tries with man-of-the-match Matt Toomua and Tevita Kuridrani each crossing over for a brace.
The Chiefs finished with tries to replacements Brad Weber and Josh Hohneck, but an intercept try to Toomua after the siren sunk any hopes of nabbing a bonus point.
"It's an outstanding result for us and we were after a really complete 80 minutes, so for us to do that tonight was really pleasing for the team," said Mowen.
"Hats off the back-line guys because they were outstanding tonight, Matt Toomua at number 10 was really good."
Chiefs skipper Liam Messam said errors and ill-discipline cost his team.
"We made some basic errors with the football and our discipline is letting us down along with basic handling errors," he explained.
"Full credit to the Brumbies. They really stuck it to us and put pressure on us."