The Viper Brothers: Prison Gang 13 (1972)
Original title: まむしの兄弟 懲役十三回
The Viper Brothers: Prison Gang 13 is a 1972 Japanese-language crime movie directed by Sadao Nakajima, with a running time of 1h 33m. It stars Bunta Sugawara, Tamio Kawachi and Shigeru Amachi.
Part 3 in a long running (8+1 films) action/comedy/melodrama series about a pair of short tempered, amoral, but not evil chinpira (Bunta Sugawara and Tamio Kawachi) thinking too big of themselves.