Fireball

The FireBall is a purple muscle car rarely seen being driven by the South League, it is unlocked by completing one of the races in Paradise City. In the Dregs of society, it is also used by the Dreg Lords, even though it's supposed to be a South League vehicle

Insperation
The Fireball is based off of a  1970's Pontiac Firebird

Usefullness
It is a very cool car, but only usefull for races or just cruising around.