The Stormers claimed a valuable win on the road on Saturday, beating the defending champion Waratahs 32-18 with a bonus point in Sydney.
The vistors outscored the defending champions four tries to two. Three of those Stormers tries came from long range as the men from Cape Town pounced on every counter-attacking opportunity.
The Waratahs led 15-13 at the interval thanks to tries from wingers Taqele Naiyaravoro and Rob Horne although the Stormers had been ahead for much of the first-half with centre Damian de Allende touching down.
The Stormers took control after the break as Kobus van Wyk crossed before De Allende snatched his second try to secure the win.
The result is the Stormers' first win on their overseas tour and provisionally takes them back to the top of the South African Conference.
Demetri Catrakilis opened the scoring for the Stormers with an early penalty but the Waratahs were first to cross the whitewash as Naiyaravoro powered through three defenders to score following Israel Folau's initial break.
Bernard Foley missed the conversion and the Stormers moved back in front soon afterwards as Catrakilis slotted his second penalty.
The Stormers stretched the gap as the game entered the second quarter when De Allende finished off a 85m counter attack. Catrakilis landed the conversion to give the Stormers an eight-point lead at 13-5.
Foley was on target with his next shot on goal before Waratahs bagged their second try just before half time as Rob Horne dove into the corner to level the scores. Foley's conversion put the home back in front as the teams swapped ends.
The visitors took the game by the scruff of the neck as Van Wyk raced 60m down the touchline after collecting Cheslin Kolbe's chip ahead. Kurt Coleman added the extras to make it 20-15 to the Stormers.
Foley's second penalty narrowed the deficit to two points going into the last quarter but the 'Tahs were struggling to break down the Stormers' well-organised defence.
The Stormers would strike twice more from inside their own half in the final ten minutes. First Juan de Jongh intercepted and offloaded to put De Allende away before Cheslin Kolbe snapped up a loose ball to bolt home.