YA0653 Helmet coupling to suit Stilo Air Tube & Coupling kit

The Stilo Side Air system is a 'forced air' intake via a pipe that can direct air into a driver's Stilo ST5 helmet through one of the integrated sideports. This part is fitted into the shell of an ST5 GT and will connect to a Stilo Air Hose (YA0639) or other custom-made air intake system.