Hey i was planning to switch my Mixer system on my AU, i wanted to switch it to the Injection system. Is it possible to do this? and would i get the rebate?

No, you won't be eligible for the rebate - a good reason not to switch. If you already have a mixer setup installed, either stick with it or pass the car on and get a new one if you desperately want an injected system.

Regards,
Dave