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Fast & Furious 6: The Game Upgrades

Fast & Furious 6: The GameMore guides, cheats and FAQS
There are nine different upgrade areas for improving each vehicle. Here's an at-a-glance guide to what each one does - note that upgrades get more expensive as you continue through the upgrade chain.
Upgrade - Effect
Engine - Increases HP
Intake - Increases HP
Exhaust - Increases HP
Gearbox - Reduces shift time
Flywheel - Reduces shift time
Tires - Increases launch and drift quality
Body - Reduces weight
Nitrous - Increases boost duration
Suspension - Increases drift quality