The items used to create the 496 armor are found all over the island in chests and dropped by mobs, similar to the items used to create armor in Battlefield: Barrens. The Burden of Eternity is a rare drop from mobs, found in the Blazing Chest, or in one of Kukuru's chests.
The item level 535 version of the gear is called "Timeless" and is obtained by using a Burden of Eternity on an item that creates armor, such as a Timeless Leather Helm.
Patch 5.4 normal difficulty gear has an item level of 553, while flex gear is 540, and raid finder gear is 528. This makes the 535 Timeless gear a nice upgrade for players that will only raid in Raid Finder difficulty and a temporary upgrade for players who will be raiding Flex difficulty. It is also an upgrade for players who are currently raiding Throne of Thunder Normal, as well as any Heroic raiders still missing a slot.
- from MMO-C. What do you think? IMO LFR gear should be higher, 13 item levels behind normal mode just like in tier 1 of MoP, so 542 ilvl.