Stilo Helmet to 4C IMSA/Road-Race Adapter - Long Version Vehicle_Hummer allowing the thumb knob to

allowing the thumb knob to be tightened without distorting the lid

For use with vehicles that have a fiberglass or carbon fiber surface

while aerodynamic styling and ventilation keep drivers comfortable at speed

The Bell HP77 Carbon STD FIA8860 ABP Helmet is the ultimate choice for top professional racers

this air intake is designed to maximize airflow into existing ventilation channels

Stilo Helmet to 4C IMSA/Road-Race Adapter - Long Version Vehicle_Hummer allowing the thumb knob toStilo Helmet to 4C IMSA Road Race Adapter. IMSA style plugs are popular in all forms of road racing in the United States and this cable connects your Stilo helmet to an IMSA car to pit radio system.