A tuning package refers to a set of modifications or upgrades made to a vehicle's engine, exhaust system, and other components in order to improve its performance. These packages are typically designed by aftermarket companies or automakers themselves and can include anything from simple cosmetic changes to more extensive alterations that require specialized tools and knowledge. The goal of these tuning packages is often to enhance the vehicle's speed, power, handling, and overall driving experience while maintaining safety and reliability standards.