Vehicle modifications

modification of an automobile's performance

type of tire used in auto racing

automotive accessory equipment

Retrofitting is the addition of new technology or features to older systems. Retrofits can happen for a number of reasons, for example with big capital expenditures like naval vessels, military equipment or manufacturing plants, businesses or governments may retrofit in order to reduce the need to replace a system entirely. Other retrofits may be due to changing codes or requirements, such as seismic retrofit which are designed strengthening older buildings in order to make them earthquake resistant.

reprogramming a car to improve performance

Tyres used in wet weather

thumb|right|250px|Pin striping on a motorcycle fuel tank.

vehicle decoration

Opening for air to enter car engines

process to to improve fuel economy, power output, or emissions

optional body modifications for a car

externally-mounted spare tire behind an automobile's trunk