Based on data from full scale wind tunnel testing, the K1 Laboratory Ducktail Spoiler is designed to work in conjunction with GT wings to increase rear downforce while reducing drag. Its aerodynamic effectiveness has been proven on demo cars from the Arvou S2000 to the Top Fuel S2000RR. The Ducktail Spoiler S2000 is available in either FRP (Black Gel Coating) or Carbon Fiber finish.