Try and invest it so I never have to work again.
Open a performance shop.
Try to keep all the money on the DL, don't want to be too famous.
I'd be keeping my EF and building it up faster.
Buy my dream car. 97 Viper GTS.
Then live where I do now.
Pay back my parents 10 fold, for raising me and everything.
Take care of my family and close friends.

and thats just initial things I'd do. I'd be living somewhere in the mountains, have a home in japan, find a honest woman, have many cars, race in certain events, and donate large sums of money to anyone that needed it.