In Wrath of the Lich King it is item level 258, requires level 80 and sells to vendors for 8g 66s 61c. In MoP Classic it is item level 232, requires level 80 and sells to vendors for 12g 10s 94c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Stormrage Helm Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Stormrage Helm suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Transmog Sets
Stormrage Helm is part of the transmog set Stormrage Raiment (Druid only). The other 13 pieces:
Blizzard numbers items as they are created, so the named items next to ID 49328 (49323 to 49333) were usually added in the same batch as Stormrage Helm: the same quest line, zone, vendor or reward set.