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World of Warcraft Item Upgrades Item upgrades are items that can be inserted into trinkets, weapons and armor for a stat boost. They are available through vendors, missions, and even on the Trading Post. Upgrading your gear is among the main ways to increase the effectiveness of your character or ship in combat. The upgrade of gear can increase its Mark Level and Rarity. Upgrade components Upgrade components are items that can be put into armor, weapons trinkets and gathering tools to provide additional bonuses.