Grievous Gladiator's Dreadplate Helm is part of the transmog set Grievous Gladiator's Dreadplate Armor (Death Knight only), which the Appearances collection lists in 2 versions. The other 6 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Grievous Gladiator's Dreadplate Helm Fits
Other Items Named Grievous Gladiator's Dreadplate Helm
4 other items in the current build are also called Grievous Gladiator's Dreadplate Helm. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Grievous Gladiator's Dreadplate Helm
Blizzard numbers items as they are created, so the named items next to ID 100248 (100243 to 100253) were usually added in the same batch as Grievous Gladiator's Dreadplate Helm: the same quest line, zone, vendor or reward set.