Pro versions are superior because they provide performance boosts with fewer trade-offs (e.g., increased speed without losing durability). You must equip the Standard mod first to start tracking progress toward its Pro version. Mod Category Pro Milestone Requirement Pro Shortcut/Tip Drift 5,000 yards (4,572 meters)
If you prefer to earn them, here are some of the fastest ways to hit common Pro milestones: Off-Road Pro nfs most wanted 2012 unlock all upgrades