It is based on a West Coast Choppers El Diablo series bike and is the vehicle of choice for The Angels of Death. One of the most radically designed choppers in the game, the bike features a flame-based rim design.
The Hellfury handles similarly to the Freeway. It turns very widely, even at low speeds. However, it has a fast top speed, and can easily win races.
Strangely, this bike is used by The Lost in TLAD, but in GTA IV and TBoGT it is used by the Angels of Death.
It's interesting to note that when you exit the bike in the engine-off state, it falls to the left side as if held up by the kickstand, but if you look closely the kickstand remains in the up position.