Car tuning is the modification of a car‘s performance and/or appearance. It is often done to improve the car‘s performance, handling, and/or fuel economy. Common modifications include the installation of aftermarket parts, such as exhaust systems, air intakes, suspension systems, and turbochargers, as well as customizing the car‘s appearance, such as painting or vinyl wraps. Tuning can also involve modifications to the car‘s engine, such as increasing the engine‘s power output or adjusting the engine‘s fuel–to–air ratio. Other modifications include remapping the car‘s onboard computer, which can improve the car‘s acceleration, handling, and fuel economy.