In the Appearances collection, Chestguard of the Failed Experiment is listed as Boss Drop. Appearance ID: 12773. No other item uses this appearance, so it is unique to Chestguard of the Failed Experiment.
Read from the World of Warcraft client build files.
Where Chestguard of the Failed Experiment Comes From
Chestguard of the Failed Experiment Drops From
The in-game Adventure Guide lists Chestguard of the Failed Experiment in the loot of 1 encounter.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Chestguard of the Failed Experiment Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Chestguard of the Failed Experiment 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
Chestguard of the Failed Experiment is part of the transmog set Malfurion's Battlegear (Druid only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Chestguard of the Failed Experiment Fits
Other Items Named Chestguard of the Failed Experiment
1 other item in the current build is also called Chestguard of the Failed Experiment. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Chestguard of the Failed Experiment
Blizzard numbers items as they are created, so the named items next to ID 51870 (51865 to 51875) were usually added in the same batch as Chestguard of the Failed Experiment: the same quest line, zone, vendor or reward set.