Modern cars are more aerodynamic than ever before, in the sense that most have much less drag when driven at highway speeds to help boost fuel economy. But even the slipperiest cars can be scary to drive when the speeds are ramped up, because the front or rear ends of the car can lift and make the car difficult to control. That’s why when production cars are adapted for the racetrack they usually have modifications like air dams, side skirts, and spoilers.

Featured Products

  • Pure® Custom Style Rear Window Mount Spoiler
    (11 reviews)
    # sp198
    Custom Style Painted Rear Window Mount Spoiler by Pure®. When you want a classy, understated high performance look you want a roofline, or window mount spoiler. This spoiler will add a touch of speed while perfectly melding with...
    $120.24 - $308.95
  • Street Scene® Custom Style Rear Window Spoiler
    (0 reviews)
    # sp7705
    Custom Style Rear Window Spoiler by Street Scene®. This great add-on is designed to complete the sporty look of your vehicle and boost its aerodynamics in nothing flat. The spoiler is built tough to take everyday road hazards and...
    $135.23 - $218.58
  • 3d Carbon® Custom Style Rear Roofline Spoiler
    (5 reviews)
    # sp3586
    Custom Style Rear Roofline Spoiler by 3d Carbon®. Add a cleanly-styled and strong visual performance boost to your vehicle with a spoiler from 3dCarbon. Also increases aero down force on your vehicle's rear for better road holding....
    $143.88 - $349.67
  • D2S® Custom Style Rear Roofline Spoiler
    (15 reviews)
    # sp257
    Custom Style Rear Roofline Spoiler by D2S®. Alter your car's silhouette with a refined high performance accessory. The Custom Style Rear Roofline Spoiler will give your car a classy, tasteful look that will enhance the overall...
    $148.63 - $2,274.00
  • Dawn® Custom Style Rear Roofline Spoiler
    (18 reviews)
    # sp405
    Custom Style Rear Roofline Spoiler by Dawn®. Give your car an understated performance look with this Custom Rear Roofline Spoiler. Its low profile will blend in perfectly with your car's innate style and at the same time impart a...
    $116.90 - $217.10
  • Xenon® Custom Style Rear Window Mount Spoiler
    (2 reviews)
    # sp3602
    Custom Style Rear Window Mount Spoiler by Xenon®. At speed, a properly designed rear spoiler can provide downforce and increase traction. You may not regularly drive fast enough to enjoy this benefit but you always enjoy the image...
    $181.36 - $216.35
  • Duraflex® Custom Style Rear Roofline Spoiler
    (8 reviews)
    # sp3593
    Custom Style Rear Window Mount Spoiler by Duraflex®. Each part may be ordered separately. Professional installation is required.
    $71.10 - $575.10
  • T5i® Factory Style Rear Roofline Spoiler
    (32 reviews)
    # sp423
    Factory Style Rear Roofline Spoiler by T5i®. When you want to add just a touch of high performance style, nothing beats a roofline spoiler. A roofline spoiler adds the look of speed without detracting from the car's beautiful...
    $98.53 - $267.20
  • AIT Racing® Rear Window Spoiler
    (0 reviews)
    # sp3868
    Rear Window Spoiler by AIT Racing®. Minor adjustments might be necessary. These are normal body work and installation steps. Therefore it is NOT considered to be defective.
    $155.20 - $334.00
  • Remin® Factory Style Rear Roof Spoiler
    (2 reviews)
    # sp6590
    Factory Style Rear Roof Spoiler by Remin®. Add a subtle look of performance to your car with this Roof Spoiler. Its low profile design provides just the right amount of performance style without being overpowering.
    $100.20 - $273.88
  • Beat-Sonic® Roof Spoiler
    (0 reviews)
    # sp4288
    Roof Spoiler by Beat-Sonic®. Focused on innovation and quality, Beat-Sonic is sure to enhance your driving experience. You will definitely enjoy every minute behind the wheel!
    $0.00
  • VIS Racing® Custom Style Rear Window Spoiler
    (0 reviews)
    # sp7240
    Custom Style Rear Window Spoiler by VIS Racing®. With this great part installed on your car, you will have best of both worlds: sleek, racecar look and boosted overall performance. The spoiler is manufactured from high-grade...
    $187.92 - $842.51
  • T5i® Custom Style Rear Roofline Spoiler
    (4 reviews)
    # sp6212
    When you want to add just a touch of high performance style, nothing beats a roofline spoiler. A roofline spoiler adds the look of speed without detracting from the car's beautiful lines. This roofline spoiler is made of quality...
    $98.53 - $332.33
  • Pure® Factory Style Rear Window Mount Spoiler
    (4 reviews)
    # sp8477
    Factory Style Rear Window Mount Spoiler by Pure®. Give your car a factory style performance look with this rear window mount spoiler. Its tasteful low profile design will provide a visual focus while enhancing your car's...
    $150.30 - $308.95
  • Liberty Walk® Rear Window Spoiler
    (1 reviews)
    # sp9961
    Rear Window Spoiler by Liberty Walk®. You can make your car look much hotter and more sporty just by adding this spoiler. A new spoiler keeps the overall style of your car. Give your truck that aerodynamic exclamation point with a...
    $380.00


Featured Brands

The aim of such additions is to overcome design problems that only reveal themselves at high speeds. They’re generally devised to provide downforce and counteract the vehicle’s tendency to lift, so the tires stay firmly in contact with the road surface for traction, braking and steering control. Such modifications can often increase drag, but the goal of the car builder is to achieve a balance between the necessary downforce and the minimal amount of drag.

The effectiveness of the spoiler is dependent on its size, angle and the shape of the car. If its primary function is to provide downforce, it will be angled more vertically so the high speed airflow coming off the roof toward the back of the vehicle is disrupted, reducing its velocity and creating high pressure. However, spoilers can also be designed to reduce drag. On some cars the distance between the rear edge of the roof and the tail end disrupts the airflow and increases drag. A properly designed spoiler can, in effect, lengthen the distance or make the slope gentler, preventing airflow separation and reducing drag.

Regardless of where a rear spoiler is mounted on a street-driven car, it won’t affect handling much when the vehicle is at legal highway speeds. Spoilers are firmly rooted in racetrack performance, but in the realm of public roadways they’re much more for show than go. On a sedan, a roof spoiler can provide an unexpected styling element, one that catches the eye as it scans the vehicle’s roofline, creating visual interest in the overall design. Roof spoilers can often be more pronounced on a hatchback. A properly designed spoiler can improve airflow over the vehicle and create an aggressive, performance look.

Along with a large selection of styles, our roof spoilers also come in the most popular aftermarket body accessory materials including lightweight, affordable fiberglass; tough, durable ABS plastic; flexible urethane; and high-tech carbon fiber. Most install quickly and easily with strong 3M adhesive. You can order your spoiler unpainted, but we strongly urge you to choose the painted option. A local body shop won’t be able to paint the spoiler for less than the price difference, and your spoiler will arrive at your door color-matched to your vehicle and ready to install.

Related Categories

Guides & Articles

  • Spoilers
    What Kind of Spoiler is Right for You?
    The function of a rear spoiler is to control the flow of air streaming over a vehicle and properly manage it when it reaches the rear where turbulence is most likely to form. A correctly designed spoiler will counteract the lifting forces that most cars experience when speeds get high, and it will enhance rear grip by keeping a vehicle's rear end planted firmly against the road - without causing excess drag.

Rear Window Spoilers Reviews

Average rating:  4.5  4.6 - 143 reviews
Read All Rear Window Spoilers Reviews
5 of 5
Easy Install Swap Out
Very easy to swap out the stock antenna for the shark. Comes with grounding screw(s) and ready to mount.
CPosted by Calvin (San Francisco, CA) /
2012 Toyota Prius
Was this review helpful for you? Yes
View More
Related Rear Window Spoilers Pages
SECURE SHOPPING

All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only.
It is neither inferred nor implied that any item sold by CARiD.com, is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.