Car spoilers are aerodynamic additions that are normally mounted on top of a car's trunk or positioned under the front bumper. Car spoilers make a car unique and stand out in a crowd. Car spoilers also improve the car's performance and sometimes stimulate its resale value.

Car spoilers are quite easy to install, and usually come with sealing gaskets and mounting bolts. Most car spoilers are made from polyurethane, while some are made from lightweight steel or fiberglass. Some spoilers make use of a combination of two or three dissimilar substances. Car spoilers made of "high impact resin" have high density with extreme temperature resistance and are super impact resistant. These types are also lightweight and durable, and will not crack, separate or sag.

The frontal car spoilers are also called air dam. The rear spoiler, sometimes known as a wing, provides a downforce for better stability when accelerating at top speeds. Some rear spoilers come with a warning brake light built into the spoiler.

Car spoilers used on a race car reduce its lift and drag, as well as increase the amount of force pushing the vehicle's tires to the road surface. These, in turn, would ensure to boost in traction, permitting the car to brake, turn, and accelerate properly and more forcefully.

Spoilers come in different weights, therefore adding any amount of mass to the rear of a car will impact driving in varying augmentations. A car with a good spoiler means that there is less resistance, which would result in a higher top speed.

Car spoilers are available universally, and can be ordered through the Internet as well. Many designs are offered for each vehicle manufactured. Generally, spoilers can be purchased unpainted so that one may have it painted for an accurate color match with their car.