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World of Warcraft - Item Upgrading The upgrade of an item allows players to boost the gear score of an item to 700 and add a final perk. Items can be upgraded by keeping them in inventory, and then taking them to the kiln. Certain items can be upgraded to increase their stats (like perfect broken point armour that is rolled for melee PvP) while other items, such as weapons do not vary greatly post upgrade, and therefore aren't worth upgrading. Weapons Upgrades to weapons can boost their numerical stat