Rangiuru, who hadn't lost since they met Paroa in round one, did more to lose the match than they did to win it.
Rangiuru led 13-10 at halftime and maintained the margin until late in the game, with neither side looking like of scoring in the abysmal conditions. But with time up on the clock Rangiuru's discipline let them down and Paroa was given a penalty 40m out, which Maru Henry nailed to send the Paroa crowd into raptures and his team into extra time.
The defining moment came in the fifth minute of added time when former Steamers prop James McGougan picked up the ball 8m out from Rangiuru's line and crashed over.
McGougan pulled his calf muscle in the process but said it was more than worth it. "Yeah, it hurts, but mate I'm happy to live with that for us to take the win."
Although Rangiuru were able to level the score with a try to Wi Kendall in the dying minutes of the match, Ngatai Kingi couldn't convert from the sideline. With the score at 18-all, because Paroa scored first in extra time the Eastern Bay side were awarded the win and promotion.
Rangiuru coach Peter Woods said it was hard to lose in the manner they did.
"That's finals football. To lose on a technicality like that is tough one to take."
Katikati held Arataki scoreless to take out the Baywide division two crown 13-0, having led 3-0 at halftime.
One-way traffic was the order of the day in the senior reserve title decider, with Tauranga Sports besting Whakarewarewa 29-0 at halftime before going on to clinch the title with a 56-0 victory.
Like the division one final, the colts championship was decided in extra time between Te Puna and Tauranga Sports. Tauranga made the early running and led 10-0 at the break, courtesy of a try to John Bosco Tagaloa and a conversion and penalty goal from Geoff Berry.
Te Ohia Tuhakaraina scored a try for Te Puna in the second spell before the Tauranga side replied when Jay Michalik crossed for Tauranga Sports. With a minute of regular time remaining, Te Puna prop Tamiti Jory crashed over for a try with Shaun Borrell calmly slotting the conversion to square the game up at 15-all.
Iria Peita nailed it for Te Puna in extra-time when he crossed for his side's third try, with Te Puna holding on to win the McIntosh Shield for the first time in over a decade.