The home team Västervik connected a certain grip on the match and after nine heats the team had driven up to 30-24 mainly through Sam Masters and Linus Sundström who scored half of the points.
Then Dackarna showed the class and took home five heat victories in a row with the score 22-8 and thus decided the match.
The guests had a high and even level of drivers.
Jacob Thorssell scored 11 points and Joel Kling, Frederik Jakobsen and Hans Andersen all scored 9 points.
Tilt for Berntzon
Tonight's performance was, however, Dackarnas Oliver Berntzon.
After a hefty lap in heat three where several drivers were involved, he was the only one who was unable to re-run the heat.
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Here, the future World Cup driver crashes
He came back three heats later and made a fantastic overtaking when he from third place slipped past Mads Hansen and Linus Sundström on the last lap.
He then stood over the rest of the match.
The result means that the Ducks take third place and face the Indians in the quarterfinals.
Västervik becomes seventh and meets Rospiggarna.
The playoffs start on Tuesday with double meetings, where the best placed teams end at home on Wednesday 23 September.