Arai Corsair X GP Spoiler Extension Known around the paddock as the Df-X2 Diffuser Extension, this aero-tuned bit of kit functions as a race-style supplemental spoiler attachment for Arai Corsair X Helmets. As used by professional race teams, this spoiler add-on mounts to the rear of the helmet to smooth high speed airflow and add stability. The GP Spoiler features improved aerodynamic properties designed to spare tenths of a second at full race speeds. Features: Add-on supplemental track spoiler Break-away design maintains safety standards of the Corsair X Helmet Available in translucent light smoke as shown