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World of Warcraft Item Upgrades Item upgrades are items that can be slotted into trinkets, weapons and armor for an increase in stats. They can be found through vendors, missions, and even on the Trading Post. Upgrading gear is one the primary ways to improve the effectiveness of your character or ship in combat. The gear that is upgraded increases Mark Level and rarity. Upgrade components Upgrade components are items that can be added to armors, weapons trinkets, tools for gathering and weapons to earn additional bonuses. These bonuses range