Roll cages may be difficult to install when the original equipment interior is present.Some tuners will have "gutted" interiors, or omit features that many ordinary drivers would find desirable or necessary, such as audio systems, air conditioning and soundproofing in order to reduce vehicle weight.Both moderate and radical modification have been commemorated in the popular songs Hot Rod Race and Hot Rod Lincoln.
Cars may be altered to provide better fuel economy, produce more power, or to provide better handling and driving.
Car tuning is related to auto racing, although most performance cars never compete.
All cars competing in each class must adhere to a strict set of regulations.
As in some well-known racing events, like NASCAR and NHRA, sanctioned events often require a minimum vehicle weight.
In such cases the interior is stripped, and the required weight is achieved by adding ballast that allows precise control over weight distribution.
Along with weight requirements, safety requirements are present . Roll cages, fire extinguishers, reinforced bucket seats, seat harnesses, and the like are some of the required safety modifications.Events are held where entrants compete for the loudest, highest quality reception or most innovative sound systems.Some common modifications include higher quality speakers and sub woofers, amps, a better wiring system, etc.Car tuning is modification of the performance or appearance of a vehicle.For actual "tuning" in the sense of automobiles or vehicles, see engine tuning.Although this largely involves modifying the engine and management systems of the vehicle to increase the power output, additional changes are often required to allow the vehicle to handle this power, including stiffened suspension, widened tires, better brakes, improved steering and transmission modifications such as the installation of a short shifter.