The spoiler can generatedownward pressure, helping tomaintain stability and improveits high-speed performance. By mounting these spoilers you increase the vertical downforce at high speeds, an effect that improve the stability of the bike and reduce the risk of losing control over the front axle. By changing the direction and speed of the air flow, the lift force of the rearof the vehicle is reduced, and the adhesion of the rear wheel is increased,thus improving the high-speed stability and handling performanceof the vehicle. Adjust for improvedaerodynamics. can help reducefriction between the air and theground, thereby reducing drag andimproving efficiency. lmprove stability. Fitment: For 939 2017-2020 950 2021-2023 Color: Carbon Fiber Pattern Material: plastic Package Contents: 1 x Center Headlight Fairing Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.