Performance parts refer to aftermarket components designed to enhance the speed, power, handling, or overall capabilities of a vehicle, such as a car or motorcycle. These parts can include upgraded exhaust systems, air filters, turbochargers, suspension components, and performance-oriented tuning software. Enthusiasts often invest in performance parts to improve acceleration, horsepower, and overall driving experience. It's important to choose parts compatible with the specific make and model of the vehicle, and installation may require expertise to ensure optimal results and safety.