In The Burning Crusade it is item level 159, requires level 70 and sells to vendors for 10g 72s 73c. In Wrath of the Lich King it is item level 238, requires level 80 and sells to vendors for 10g 72s 73c. In MoP Classic it is item level 159, requires level 70 and sells to vendors for 10g 72s 73c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Felfury Legplates Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Felfury Legplates suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Felfury Legplates is part of the transmog set Onslaught Battlegear (Warrior only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 34180 (34175 to 34185) were usually added in the same batch as Felfury Legplates: the same quest line, zone, vendor or reward set.