The brother and fiancee of a dead policeman infiltrate a female-led biker gang to uncover his murderer.

Dr. Roger Girard is a rich scientist conducting experiments on head transplantation. His caretaker has a son, Danny, who, although fully grown, has the mind of child. One day an escaped psycho-killer invades Girard's home, killing Danny's father before being gunned down himself. With the maniac dying and Danny deeply unsettled by his father's death, Dr. Girard decides to take the final step and transplant the killer's head onto Danny's body.

Driven by jealousy, the jilted leader of a female motorcycle gang instigates a sadistic reign of terror against her ex-lover and his new bride.

Chino is the tough leader of a motorcycle gang who starts off a war when he abducts and mistreats the leader of the enemy biker gang, Darryl, and his girlfriend Chris. Things get violent when Darryl comes back for revenge.

Eight women miners get fed up with their lifestyle and decide to try crime. After successfully pulling off a jewelry store robbery, they are busted by narcs when they try to buy cocaine. The eight get sent to a prison where a butch head guard uses the prisoners for her own deviant pleasures. Two of the women manage to escape and then get mixed up with a shah who had a scarab ring stolen in their jewelry heist.

A man flees with his girlfriend from a love-in and motorcycles to Mexico with drug smugglers.

A wild gang of bikers who shamelessly idolize the Nazis, brutalizes anyone or anything that stands in their way. Dealing in illegal weapons, assassinations, power and violence, they seem invincible until they push one man too far... When his girlfriend is savagely murdered, he declares a personal war...but to destroy them, he has to join them!

A small Arizona town is plagued by violence created from the tension between Anglo and Mexican-American youths. Tony (Tom Nardini) is the idealistic new kid in school who tries to alleviate long-time tensions between the rival factions. The Mexican gang is led by Paco (Zooey Hall), a hot-tempered youth with good reason to resent some of his Caucasian counterparts due to past prejudices. Bruce (David Macklin) is the leader of the white gang. Patty McCormack and Joanna Frank are the female interests who become victims of the gang struggles. Tony, formerly from San Diego, attempts to change the attitudes of the polarized and violent groups. Simms (Russ Bender) is a bigoted educator who fans the flames of hate, and Wilson (Arthur Peterson) is the school principal who is helpless to stop the violence between the two factions.

When hot-headed Dan out-drives the thoroughly vicious Tony in a motorcycle race and wins a brand new bike, he sets in motion a chain of events that includes one blazing gas station and a disastrous rock slide.

Bigfoot kidnaps some women and some bikers decide to go on a rescue mission to save them.