After market car parts is a fast growing business in the USA. Many car enthusiasts love to make their car unique and stand out from the crowd by making modifications to the original. Though due to the limited options given by car manufacturers some look elsewhere. That is where aftermarket car parts come in. When purchasing a new car from an auto dealer, there is something commonly known as "stock" which are the standard options provided by the dealer. These standard stock options include the essential components such as engine, transmission, wheels and also performance part. The stock can also include interior car parts such as lighting. Though many dealer do provide upgrades to a certain extent these are still limited for many car enthusiast, some extras can include alloy wheels, satellite navigation and other extras. Thus many people look elsewhere to truly modify there vehicles. Some people may purchase aftermarket car parts for safety reasons such as xenon headlight upgr