However they will all have one last chance to qualify via the Repechage race which will start tonight's racing - with the top 3 finishers going through to the finals field.
Former South Island Champion Brett Nicholls of Nelson will start from the favoured pole position, after coming close to qualifying before being hit out of contention by Wellington's Alan Levien.
Five drivers have already earned their place in the 26-car final, including the four international drivers taking part and last year's winner Scott Joblin.
Technical Welding Services World Invitation 240s Superstock Championships
When: Saturday from 7pm - Finals (gates open from 5pm)
Where: Paradise Valley Raceway, Rotorua
Tickets: $25 Adult / $10 Child / $55 Family (2 adults and up to 4 children)