The band's rhythm section would go on to form Painted Willie in 1984, and sign with SST Records in 1985, and embark on a six-month national US tour with Black Flag in 1986.

Longtime member and primary songwriter Phil Newman died after an apparent accident on a sail boat, February 22, 2015;[2] the band has no plans to continue.

The band was established by vocalist Julie "Jules" Lanfeld and drummer Dave Markey, who met at a Middle Class show at the Starwood in West Hollywood.

Vallejo played a few shows before returning to his main band, soon to be replaced by Chris Pedersen, who went on to star in the 1984 film Suburbia, and finally finding permanence with guitarist Mike Glass.

[10] In December 2011 SIN 34 plays one of the largest shows of the band's reformation at GV30[11] in which radio station KROQ honored Gary Tovar and Goldenvoice Productions for 30 years as concert promoters.

[12] The SIN 34 logo was featured on the cover of Markey's book We Got Power,[13] which chronicled the hardcore punk scene in the 1980.s[14] The band plays its last show June 2, 2012, at Webers in Reseda,[15] and once again goes on hiatus.

[17]== Glass, Markey, and Newman joined lead singer Steven McDonald of Redd Kross to form Anarchy 6, a hardcore punk parody band.

Using the pseudonyms Chemical Warfare (McDonald), Spike Geek (Glass), HC Skinner (Newman) and Mark Davey (Markey), they released the studio LP Anarchy Lives!