Hello! Good to have you on here. I don't mean this disrespectfully, but you might find it easier to find a supercharger kit for a kangaroo versus a Mirage. And a supercharged Kangaroo might be faster too!
I think it's fun and more power to ya if you want to hop up your Mirage. However, I might suggest you spend small money on maintenance on keeping the Mirage rolling efficiently, and spend bigger fun money, on a more capable (car) toy. Where a Mirage wins is being INEXPENSIVE. Let's say you spend some money on it and get 20% more power (doubtful). That's then 78 hp + 16 hp = 94 hp. You still get crushed by Civics and Corollas. What's the point of that? Not much value in that (in my opinion).
But find some V8 saloon in Australia that you can fix up and make a fun car out of it, and have the Mirage as an inexpensive daily driver, then you got something.
I may be preaching to the choir. And, none of this makes me right. Just throwing my $0.02 out there. You have my backing no matter what you choose to do with your money.
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View my fuel log 2020 Mirage ES 1.2 manual: 42.4 mpg (US) ... 18.0 km/L ... 5.5 L/100 km ... 50.9 mpg (Imp)