Festival hosts Grey High edged Michaelhouse 10-7 in the final game of the 2014 festival.
Grey held on against a spirited Michaelhouse team to end the festival unbeaten.
Also on the final day, SACS beat Durban High 24-14, Pretoria Boys' beat Hudson Park 20-8 and Graeme College and Windhoek Gym played out to a 13-13 draw.
Day 3 results:
Westville 22 HTS Louis Botha 8
SACS 24 DHS 14
Graeme 13 Windhoek Gym 13
Hudson Park 8 Pretoria Boys' 20
Itehmbelihle 0 Grey Unicorns 41
Muir 17 Parktown 15
Grey PE 10 Michaelhouse 7
Photo: Stan Blumburg