Flu Thirteen was an indie rock band from Long Island, NY. Formed in 1994 by Tomas Costanza (Vocals/Guitar), Brian Fawcett (Guitar), Lawrence Sullivan (Bass) and Billy Alemaghides (Drums), they went on to release two albums and a 7 single. After a few line up changes, the band signed a major label deal in 2000 and changed their name to Diffuser.

Final Lineup
Tomas Costanza: Vocals/Guitar
Anthony Cangelosi: Guitar
Lawrence Sullivan: Bass
Chris Sanchez: Drums

Former Members
Brian Fawcett: Guitar (1994–1998)
Billy Alemaghides: Drums (1994–1995)