The game was punctuated by off-the-puck action, with players pushed into wall boards and other foul play.
The Ice Blacks had won the first three games in the series against Finnish club side HC Storm.
The Finnish team was determined to turn the tables and used rough-house tactics in front of a crowd of about 450 vocal fans at the Dunedin Ice Stadium.
It all came to a head with just three minutes left in the third and final spell when Hayden Argyle (Ice Blacks) and Ari-Pekka Viitasalo (HC Storm) started throwing punches at each other.
The referee ordered both off the ice for the remainder of the match for game misconduct.
The Ice Blacks won the game 5-3 to complete a clean sweep of the series.
New Zealand led 3-1 after two of the three spells, but the Finnish team came out aggressively to draw level with goals to Teppo Haakana after five minutes and Joni Koskela after 15 minutes of the final spell.
A minute later, New Zealand snatched back the lead from a face-off when Jordan Challis scored after a wrap around the goal tender.
The Finnish team continued with its disruptive tactics in the final minutes while New Zealand played sensible hockey from a power play and Brett Speirs snapped a shot from the blue line to clinch the game.
The New Zealand team has used the series as a build-up for the third division world championships in Dunedin on April 10-16.
"The championship is being held at the start of our season, " manager Charlie Reid said.
"The last time our boys had played matches was in September.
''The northern hemisphere teams have had a full season and are game-hardened.
"As a southern hemisphere team we are on the back foot and needed the games against HC Storm to prepare our team."
The HC Storm certainly gave the Ice Blacks the hard game they needed last night.
"It was a more competitive game.
''The Storm wanted to win and were ready to take it to us tonight," Reid said.
"In the first three games there were no altercations like tonight.
''Our guys certainly had a hard work-out."
The Ice Blacks had previously won 7-5 and 6-3 in Auckland and had a 15-5 win in Queenstown on Thursday night.
"We kept the pressure on at Queenstown and HC Storm ran out of legs in the final spell," Reid said.
The other teams competing in the world championships next month are Turkey, Greece, Ireland, Luxembourg and Mongolia.
New Zealand Ice Blacks 5 (Josh Hay 2, Brett Speirs 2, Jordan Challis), HC Storm 3 (Ari-Pekka Viitasalo, Teppo Haakana, Joni Koskela).
