On the second island after u do enough missions u will be able to buy a place called wang cars buy that then if u go to the other side of the road and down the lane which heads towards the airport their is a save point and some garages go to your map and put a red point where they are (so u know where it is) then go back to wang cars and go behind it where there is a race flag on your map and a red point on the ground now do some races like go go karting.etc then take the car when u start to the red point where your garage is and park it in it then walk out and u will get disquallified then u appear at wang cars so then go to your garage and the car will be there u can get a Go Kart,Phoenix,bullet,sanchez,and some others that are really cool if u mod them.