Visit the Test Track inside of the LS Car Meet, to put the Grotti Itali RSX, Grotti Furia, Grotti X80 Proto through their paces on the painted track, Scramble between the columns, or floor it in a Time Trial.
Head to the LS Car Meet icon on your GTA Online map to gain access to the Test Track. Use the interaction menu to invite other players to join you on the Test Track.
