The lions were poisonous despite the absence of double world champion Bartosz Zmarzlik, who is charging the World Cup at home.
Mattias Thörnblom was uneven today but in the sixth heat he taught the World Cup star Fredrik Lindgren and Peter Ljung.
The Lions were almost all the way in a small points deficit but had the chance before the final heat.
Two points behind before the 14th heat which became a dramatic story.
The lion's Dominik Kubera chased Västervik's Bartosz Smektala but came too close and was ruled out.
In the restart, Smektala and Ljung had no problem closing the match with a five.
Västervik is still undefeated and a new table with one match more than Smederna after 47-43