Bell makes the GP style chin bar gurney for use on Bell models including the GP.3 Carbon, GP.3, M.8 Carbon, M.8 GP.2 Youth and K.1 Pro. Bell’s chin bar gurneys are designed to reduce lift and add downforce to the front of the helmet and can be used on helmets with or without a duckbill. As airflow goes over the helmet it separates near the shield area shearing downward catching the chin bar gurney and increasing the aerodynamic downforce on the helmet