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Get one of the 1 man bleeding kits from Super Cheap. They have a valve on the bleeder hose so you don't suck any air back.

Hope that new bit of pipe is not too rigid or you will break off your filter housing or split the rubber 90 going into the inlet manifold. I've seen it happen with a similar substitution instead of...

Also a heap or relays in that other pix by the looks. Maybe they are set up to run a trailer plug on 12v off that voltage converter? Have you got a towbar etc?

15x8 -19 offset is what I put on my BJ70 Cruza. With 31x10.5 the tyre walls just poked out of the guards, which is ok. VTNZ don't like tread past the guard line.