The six-year-old showed the tenacious side of his nature in the straight to hold the challenge of Ladies First at bay to win by a short head.
Araldo Junior was a long head back in third.
Kaharau's stablemate Major Tom had little trouble justifying Rae's faith in the son of Redwood when he posted a clear-cut victory off the back of a Pukekohe success six days previously.
"He doesn't need a heavy track, he's a very talented horse on dead to slow tracks," Rae said.
Major Tom completed a double for apprentice Jasmine Fowcett, who had earlier been successful aboard the Bill Pomare-trained Rich Billie Marsh.
Meanwhile On The Rocks is back in Group One contention after downing his fellow classic hopefuls at Ellerslie.
The Alamosa colt dropped down the pecking order after he was unplaced in the Karaka Million 3YO Classic (1600m), but he's back in business after knocking off a strong three-year-old line-up in Saturday's Gr.2 Electrolux Avondale Guineas (2100m).
Out of a half-sister to the Group One Melbourne Cup (3200m) and Group One VRC Derby (2500m) winner Efficient, On The Rocks raced behind the pace and he finished determinedly in the straight for the third win of his seven-start career.
- NZ Racing Desk