The Stormers remain unbeaten and usurp the Crusaders at the top of the table.
The Crusaders are second, with the Hurricanes third and Chiefs fourth.
Pulu's first for the Chiefs has likely sewn up the Try of the Season award, while wing James Lowe also crossed the line in what was a highly skilful display from the visitors.
South Africa's Stormers showed heroic defence at times and managed four tries of their own through number eight Sikhumbuzo Notshe, flanker Siya Kolisi, first-five Robert du Preez and fullback SP Marais, who also kicked two huge penalties.