Turbo cartridges do typically come balanced when purchased from a supplier or manufacturer. Balancing a cartridge involves adjusting the rotating components to ensure they spin smoothly. This balancing process reduces engine vibration and will extend the lifespan of the turbocharger. Anytime a cartridge undergoes repairs, or a new cartridge is installed, the cartridge will need to be rebalanced. Rebalancing should be done by a licensed professional, as it requires specialized equipment and expertise.