Earlier in the day, Tim Osbaldiston top scored for Boys' High with 20, with Peiris being the only other batsman to reach double figures.
Meanwhile, in what was a reply of the two-day final - and what will be the one-day final - Maungakaramea again came out on top against Kaipara Flats.
Posting 157, after being bowled out in the 31st over, Kaipara fell nine runs short as a sharp spell from Maungakaramea's Scott Harris produced three for 14 from five overs.
For Maungakaramea, New Zealand representative Kurtley Watson led the way with a swift 34 from 38, which included three fours and a six. Backing Watson up was his Northland team mate Neal Parlane, scoring a measured 29.
With the ball, Kaipara's Jordon Kose was the pick of the bowlers with his three for 13 - supported by teammate Shaun Beamish [three for 29].
For Kaipara, Findlay Buchanan was the pick of the batsmen with his 40, followed by Michael O'Flaherty with 31.
In the remaining Lion Red Cup match from the weekend, Kamo overcame Onerahi Central.
Next weekend sees club cricket come to a close, with a double header seeing the final round of matches take place before the final is played at Cobham Oval on Sunday.
With one round of matches remaining, Maungakaramea and Kaipara Flats are comfortably top of the lot - meaning a third meeting in just over a month.