ok first off, coolers should not be too much of an issue. I bought the Nizpro cooler kit and got the whole exhaust and injectors and fuel pump and valve springs (the kit and caboodle) First off, are u just putting a cooler kit onto the stock motor with just a flash tune or have u done other mods to it? As everyone is telling u, find a diff tuner man, the cars are not THAT hard to tune but then again, thery are not easy, they get a bit complex depending on setup u have and driveline etc but nothing that at least 4 hours tuning cant fix. The longest tune on my car was about 6 hours but only cos there was things playing up/loose lines but all fixed. You need to either ship your car to someone in AUS to do the work for u or find a reputable tuner in NZ but not sure on the rep/skill they may have opposed to AUS shops. May be worth thinking/asking prices to ship car over once and get your car worked (save up some cash and do it all in 1 hit) see how u go man, good luck.