The Kaikorai forwards took control from the start and paved the way for a commanding win over Green Island at Miller Park.
First five-eighth Cam Rutherford scored 20 points and played a key role in Kaikorai's eight-try win against Pirates at Bishopscourt.
It was blitzkrieg rugby from the start when Harbour scored nine tries to beat Kaikorai at Watson Park.
Michael Collins was the rock in the Taieri midfield and Charlie O'Connell the hard nut in the pack that eventually wore down the Kaikorai resistance at Bishopscourt.
The lightning pace of fullback Tony Ensor outwitted the Alhambra-Union defence and gave Kaikorai an early lead that it held for the rest of the game.
The Dunedin forwards got on top in the second spell at Bishopscourt, when experienced prop Kelsey Miller came on to the paddock and settled the scrum.
First five-eighth Matt Te Tana masterminded Kaikorai's win over Zingari-Richmond in the Tom Richmond Memorial match at Bishopscourt.
University A produced its best performance of the season when it overwhelmed Kaikorai at the University Oval.
Fullback Tony Ensor showed his great speed to score the first and last second-half tries that took the game out of Green Island's reach at Bishopscourt.
Who said scrums are boring?
Fullback Tony Ensor scored a spectacular runaway try nine minutes from the end to clinch a deserved win for Kaikorai over previously unbeaten Alhambra-Union at Bishopscourt.
Taieri scored six tries and 36 unanswered points in a productive 35 minutes at Peter Johnstone Park to beat Kaikorai.
A committed Kaikorai team shut Dunedin out of the game when it gained an upset win at Bishopscourt.
Zingari-Richmond was beaten but not disgraced when it lost to Kaikorai in the Tom Watkins Memorial match at Montecillo.
The forward pack handed Pirates a get-out-of-jail-free card in its nail-biting victory over Kaikorai at Bishopscourt.
The last 10 minutes of the first half decided the game when Kaikorai squeaked home 25-23 against Alhambra-Union at the North Ground.
Lively No 8 Adam Hill played a key role in Kaikorai's 21-12 win over University A at Bishopscourt.
An organised Kaikorai side overcame injuries and a helter-skelter start by the home side to record a convincing 37-19 victory over Green Island at Miller Park.
An outstanding defensive game combined with a contribution of 25 points from Olly Cuthill, snapped Harbour's losing streak against Kaikorai, when it ran out 30-21 victor at Bishopscourt.
Andrew Reid scored 20 points to bring up 100 for the season and help secure victory for Taieri in a tight encounter at Bishopscourt.