Performance upgrades are crucial for improving your car's capabilities and increasing its Performance Index (PI). These can be accessed from the 'Upgrade' section in your garage. Upgrades are categorized into several areas: Engine (horsepower, torque), Platform and Handling (brakes, suspension, anti-roll bars, weight reduction), Drivetrain (clutch, transmission, differential), and Tires and Rims (tire compound, rim size/weight). Each upgrade affects your car's PI and often has trade-offs. For example, a powerful engine upgrade might increase PI significantly but could make the car harder to handle without corresponding handling upgrades. Always aim for a balanced build that suits the specific race type. Experiment with different combinations to find the sweet spot between raw power and drivability. Remember that some upgrades, like engine swaps or drivetrain conversions (e.g., RWD to AWD), can drastically change a car's character.
