Define basic and simple modifications?
Simple ECU Tweak + Exhaust change?
Sport Rims + Suspension Change?
Speakers + Noise Insulation?
How you want to modify its up to you.
You're asking in the wrong thread for suggestion.
End of the day, its still a Myvi.
Save the money for a better car, better yet a house.
Or better yet, spend it on good food. Lobster is GST exempted.
Basic or simple myvi modification, Which part to modify ? Q&A