On a day that ends in a five for example 235 go to Event Race Enter the race then lose it Go back to the screen with the Official Race Event Race Garage etc options It should read as the next day for example 236 Then go to the used part store Go all the way to the end after the turbo and there should be a box Select it and buy the Nitrous Note You must have a turbo to get it If you have a turbo and it does not appear exit the screen then go back in again You can now go to a drag race and while you are driving press Y to activate it