ST5 Non-Adj Top Air System L 60 to XXL 64

The STILO ST5 Non-Adjustable Top Air System is a forced-air helmet inlet designed for large to 2X-large STILO ST5 racing helmets. This top-mount air inlet delivers fresh airflow directly to the driver's face during high-speed competition, reducing heat buildup and fatigue during extended track sessions. The clear construction allows visibility of internal airflow dynamics while maintaining the sleek profile of the helmet.

The non-adjustable design provides a fixed airflow configuration optimized for consistent performance across varying track conditions. By mounting atop the helmet rather than on the visor, this system maximizes ram-air pressure when the vehicle is in motion while avoiding interference with visor operation or peripheral visibility. The clear lens design enables drivers and crews to inspect internal airflow pathways without disassembly, simplifying maintenance between race weekends. Compatible exclusively with STILO ST5 helmets in sizes large through 2X-large (approximately 60 to 64 centimeters), this inlet integrates seamlessly with the helmet's aerodynamic profile.

This component is essential for drivers competing in formula racing, sports car racing, and other high-performance motorsports where thermal management directly impacts driver performance and safety. Forced-air systems reduce cognitive load by maintaining lower cabin temperatures, allowing drivers to sustain focus and reaction time through race distance. The compact form factor—11 by 3.5 by 16 inches—ensures minimal aerodynamic penalty while delivering measurable cooling benefits. STILO ST5 helmet air inlet systems are specified by professional racing teams operating at the highest levels of international motorsport competition.

TacticalSurplusUSA stocks OEM STILO safety equipment for serious competitors and dedicated enthusiasts. This top-mount air system represents genuine factory engineering from a brand trusted across FIA racing circuits worldwide. Individual units ship quickly, allowing crews to upgrade existing helmets or maintain inventory for multi-car operations.