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World of Warcraft Item Upgrades Items that can be added to trinkets, weapons and armor to boost their stats are called upgrades to the item. They are available through missions or vendors, as well as the Trading Post. Upgrades to gear can increase the performance of your character's ship or character in battle. Gear that is upgraded increases Mark Level and rarity. Upgrade components Upgrade components are items that can be added to armors, weapons trinkets, gathering tools and other items to earn additional bon