Ok,
My suggestions are as follows since learning doesn't seem to be a part of your stunning repertoire:
1. Use 400 dollars and buy some crack, at least you will be happy when old granny's in civic gli's are frantically raping their horns to get you out of their way
2. Buy a Donkey, ram your exhaust pipe into the rear end, and watch it race your NA GTR, it would make a hell of a lot louder noise too. priceless!
3. Give me the money, I would like the entire Nagisa Auto catalogue for my GTR, pretty please?
4. Invest in zimbabwe, your money would double up within a week in their currency which would then become less than an 8 pack of toilet paper rolls in Australia
5. Strip naked in front of a mental institute and do a lil dance, they'll take you in and give you some happy shots. Similar to number 1 and it's free!!
6. Similar to number 5, strip naked with a group of people boosted by the power of viagra of which are all too eager to bat for the other team. They'll do you like the granny's in their civic gli's
7. I can't think of anything else but I think you are a natural comedian, I'll give you my recyclable bottles to watch you perform your NA conversion, and do all of the above.
8. Cut your balls off! Then if you ever get lucky with someone of equal intellectual capacity, stitch them back on and be a super cool limp dck. She would be so impressed that she might even kick it to see what happens.
So, are you sure you really want to go down this path?