Stormers gained revenge on Brumbies for last season's play-off elimination by easing to a 31-11 Super Rugby win at Newlands on Saturday.
Brumbies overcame Stormers 39-19 in the play-offs last term but were on the receiving end of a heavy defeat this time around as the hosts ran in 22 points in the second half to seal victory.
The visitors, who this week saw Australia back row David Pocock sign a new contract until 2019 but announce he would take a sabbatical from the game in 2017, were reduced to 14 men in the 63rd minute when Josh Mann-Rea was sent off for elbowing Oliver Kebble.
And there proved to be no way back for Brumbies from that point as Kurt Coleman's fourth penalty and tries from Dillyn Leyds and Vincent Koch ensured a third win in four for Stormers.
A trio of three-pointers from Coleman had given Stormers a 9-5 half-time lead despite Henry Speight's 28th-minute try for Brumbies.
Siya Kolisi crossed for Stormers' first try in the 54th minute but two Christian Lealiifano penalties either side of that score kept Brumbies within striking distance.
But Mann-Rea's loss of composure shortly after replacing Stephen Moore was decisive and allowed Stormers to tighten their grip.
Coleman converted the resulting penalty to extend the gap to eight points with Leyds going over in the right-hand corner and Koch barging over from close range late on.