According to io9, Albert Pyun's director's cut of the movie is being re-released to promote this summer's cinematic reboot.
The uncut version is said to run for 124 minutes, while the original only spans 97. It contains additional character development scenes and less "superhero action". The report went on to say that the cut is based on Pyun's own 35mm work print.
Starring Matt Salinger as the title character and Scott Paulin as Red Skull, Captain America was originally intended to be a blockbuster comic book adaptation before its funding was reduced. The film was completed on a shoestring budget and was poorly received.
Joe Johnston's Captain America: The First Avenger - starring Chris Evans, Hugo Weaving and Tommy Lee Jones - arrives in theatres on July 29.
Captain America is released on Blu-ray in May.