In Wrath of the Lich King it is item level 226, requires level 80 and is named Earthshatter Tunic. In MoP Classic it is item level 213, requires level 80 and sells to vendors for 1c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Valorous Earthshatter Tunic Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Valorous Earthshatter Tunic suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Valorous Earthshatter Tunic is part of the transmog set Valorous Earthshatter Regalia (Shaman only). The other 16 pieces:
Items Numbered Next to Valorous Earthshatter Tunic
Blizzard numbers items as they are created, so the named items next to ID 40508 (40503 to 40513) were usually added in the same batch as Valorous Earthshatter Tunic: the same quest line, zone, vendor or reward set.