Easy to install It includes 3Mdouble tape method, no modification needed.And it won't damage the original paint.Sold in pairs. No modifications or trimming required. You just need take off your stock air deflector and keep your stock nuts aside,then install new fairing side covers. -When air flows around a moving object, it must accelerate because the flow path around the object is longer than its length. For winglets, this accelerated flow around the curved nose of the fairing is an excellent choice because the potential for generating lift increases in the square of the airspeed. - It seems that the new concept is being applied to the downforce problem, that is, the vortex lift problem. In aircraft such as the F-16, the rapidly rotating vortex flows from the forward extension of the wing (called glove blades) back and forth on the wing. Such a vortex has a very low pressure at its core (a tornado is just a dangerous natural vortex). By reducing the pressure above the wing, it can be roughly doubled at a high angle of attack (for example, 30 degrees). This lift is not free, it requires power to push the angled wings and vortex system into the air. -Safety considerations limited the length of the winglet, so designers increased the number of airfoils to form "stacked" stacked airfoils, all of which generate downforce by deflecting the maximum possible air upward. PAYMENT: 1. We accept payment by Credit Card, Bank Transfer and other payment that AE supports. 2. Please list your special requirements (color, packages, value of declaration, etc.) when placing the order, or leave a message to us. SHIPMENT: 1. Please be sure your shipping address is correct. Please leave us your available phone number. It is required by the Post Office of China when filling out the shipping form 2. Normally, we will FREE SHIP the package via seller's shipping methods. Please contact us if you want to ship by other shipping models, such as DHL, UPS, FedEx, EMS, etc. when placing the order. DELIVERY TIME: All items will be delivered out within 1-3business days. By Airmail: 15-20 days to ASIA, Europe, North America By DHL, UPS, FedEx: 3-5 business days to most of countries NOTICE: We are not responsible for any custom duty or import tax. RETURNS & WARRANTY: 1. We will check the item carefully before shipping. 2. If you are not satisfied with the item for any reason, please contact us. We will either send you a new one or refund the money as soon as we receive the returned item. FEEDBACK: If you have a pleasant buying experience in our store, please leave a positive feedback for our products and services with 5-star rating. Please feel free to contact us for any problem and give us a chance to solve it before leaving a negative feedback. Your understanding is highly appreciated. _x000D_