From Lexicanum

This article needs work on its citations. For help on citation see the citation guidelines. You can help Lexicanum by fixing it.

The Ork Stormboyz are considered slightly more insane then regular orks, since they go into battle with fuel-filled rockets strapped to their backs. They borderline on being Speed Freeks, prefering high-speed combat rather then the slow walking of the other ork boyz. They would be the equivalent to jump infantry of other races.

Most Stormboyz are (usually) younger Orks who, for various, inexplicable reasons, have grown tired of the normaly anarchic lifestyle among the regular Ork boyz. Longing for discipline and a place in orkoid society, these youths often run of to join a Stormboyz Mob.

Sources

• ¹:Codex: Orks (4th Edition)