The law says you have to register for SS when you get a licence or otherwise need the goods or services of the state by the time you are 18. If you are not just turning 18 I don't know how you got this far yet without doing so.
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2004 S60R - 350+ HP, AWD, Custom FMIC & Exhaust, Active Suspension & A Big Set Of Brembos

Crazy Camber, Stretch & Poke; its the new triple-stack-bleacher-wing ricer fad that's all the rage nowadays, lol