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As of the Fifteenth Anniversary Update, bike pro upgrades were removed. Although motorcycles do require their own unique cards, the performance-increase mechanics mirror those of the cars.
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Pro upgrades are used to increase the performance values of a vehicle, similarly to Max upgrades.
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6 How to improve a car with a Pro Kit card?.3.2.1 Odds when i5 Engine card doesn't exist.3.1 Total Amounts of Different Pro Kit cards by category.
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