Maungakaramea drew level soon after and slotted home another two late in the half to go into the break with a 4-2 lead.
But with Maungakaramea once again playing casually, Hora Hora came out strongly after the break to score two quick goals and draw level once again.
As the game wore on, both teams had chances but it was Maungakaramea who kicked their attack back into action enough to get the last goal and take the win 5-4.
In the other reserve men's matches, Mangapai beat Bream Bay 5-3 while Springfield defeated Whangarei Boys' High School 2-0.
In the reserve women's matches played on Friday, Maungakaramea beat Parihaka 4-1 and Whangarei Girls' High School beat Kamo High School 1-0 while Hikurangi beat Old Girls 2-0 and Springfield beat Mangapai 5-0.