Arai Corsair-X Helmet Spoiler DF-X2 Diffuser Extension. Designed to crush or detach easily when subjected to forces beyond normal use. Allows the Corsair-X equipped with the Spoiler DF-X2 to provide maximum stability at speed without compromising the round, smooth and strong shell needed to manage impact energy and maximize the helmet's glancing off ability. High performance extension for the DF-12 Diffusers. Compatible with Corsair-X helmets.