81.7 Rock Station was a rock station based in the city of Dimworth. It is known for Elijah, Austin and Shavin listening to it during high school.
Elijah hated it for playing the same songs over and over.
Grand Theft Auto 5 reference:
Elijah referenced it in a conversation that the songs in Los Santos keep repeating and reminded him of 81.7 Rock station from Dimworth.