Fellow Aussies Justin Sedgemen and three time reigning Australian Under-21 Champion Max Fricke were named as the reserves.
Unhappy that Pedersen had squeezed him close to the wall on the back straight, the two exchanged words at the pit gate.
Then as Masters was walking back to his pit he was confronted by Pedersen's mechanic Marek Hu.
[2] Reigning Australian Champion Jason Doyle qualified for the final but was outed in a crash in the first turn in which he suffered neck and chest injuries.
Kildemand could not repeat his effort in the re-run and finished in third place behind Niels-Kristian Iversen and Maciej Janowski, missing his chance for automatic qualification.