The shot on TV with Heckel and Jeckel in the apartment is actually a snippet from Reservoir Dogs (1992). This is because the director could only use stock from other films owned by Artisan Entertainment.
During the director's audio commentary, Peter O'Fallon and Wayne Allan Rice recall the creation of the song for the flashback scene in Max's mustang with Elise, which was "? written for the movie, due to budget constraints". They refer to the band as "? a guy named Frankie Blue, and no you can't buy the record because they decided not to do a record deal". The song is actually "Shattered" by Remy Zero, who have been together for 14 years and have released multiple albums.