The Brumbies have received a welcome boost with the return of Nic White, who goes straight into the starting line-up against the Stormers.
The Wallaby scrum-half has been missing for a month with an ankle problem but replaces Michael Dowsett after the loss to the Waratahs last time out.
Rory Arnold is also back in the second-row as the Brumbies aim to pick up a first win in Cape Town since 2010.
"It’s a crucial week for both our seasons the winner gives themselves a chance at finals while the loser will have a hard time from here on in,” White said.
"They’re playing at home and their playing with a lot of confidence. Any time you get a big game at home it helps you lift and I’m guessing they’ll use that extra boost on Saturday."
Brumbies: 15 Jesse Mogg, 14 Henry Speight, 13 Tevita Kuridrani, 12 Robbie Coleman, 11 Joe Tomane, 10 Christian Lealiifano, 9 Nic White, 8 Ita Vaea, 7 David Pocock, 6 Scott Fardy, 5 Sam Carter, 4 Rory Arnold, 3 Ben Alexander, 2 Stephen Moore (c), 1 JP Smith.
Replacements: 16 Josh Mann-Rea, 17 Allan Alaalatoa, 18 Ruan Smith, 19 Jorden Smiler, 20 Jarrad Butler, 21 Michael Dowsett, 22 James Dargaville, 23 Nigel Ah Wong.
Date: Saturday, May 8
Venue: Newlands Stadium, Cape Town
Kick-off: 17:05 local (15:05 GMT, 03:05 NZST, 01:05 AEST)
Referee: Stuart Berry (South Africa)
Assistant Referees: Jason Jaftha (South Africa), Quinton Immelman (South Africa)
TMO: Shaun Veldsman (South Africa)