Stilo Top Air System intake kits. If you require a supply of fresh air into your helmet, for enhanced ventilation in hot and dusty cockpits or where fumes can be an issue, these Stilo conversions will help connect your supply pipe onto your ST4 or ST5 helmet with a full face visor fitted. The adjustable version offers the option to regulate the airflow, either an increased flow of the air towards the drivers face for breathing or towards the drivers forehead for increased cooling. The kit includes fixing tape which allows the unit to be removed in the future and refitted, for more than one installation. Both kit types displayed installed, the kits obviously do not include the helmet.