The auto accessories aftermarket is a part of the automotive industry concerned with manufacturing, remanufacturing, distribution, retail, and installation of all vehicle parts, chemicals, tools, equipment and accessories for light and heavy vehicles, after sales of automotive original equipment manufacturer (OEM) to consumers.
Estimate of 257 billion U.S. dollars as the market in the United States, aftermarket help keep vehicles on the road by giving consumers a choice where they want their vehicles serviced, maintained or adjusted.
The aftermarket including spare parts for replacement, collision, appearance and the performance, including electrical drives. The aftermarket offers a variety of parts from various quality and price for almost all vehicle makes and models on the road.
Consumers have the option to repair their own vehicles (known as a segment of do-it-yourself), or may take the vehicles to a professional repair facility (known as a do-it-for my segment).
Some aftermarket parts are designed to enhance the look and the sound of cars, not performance. In general, the purpose of aftermarket exhaust system is to increase engine power by reducing the back pressure exhaust system manufacturer. Frequent side effect of free-flowing exhaust system increases engine noise, which is desirable for some people. Aftermarket exhaust parts can also be upgraded by changing the styling looks like a muffler exhaust tips.