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Stilo ST5.1 GT Composite Helmet SA2020

As low as $949.00

STILO ST5.1 GT COMPOSITE HELMET SA2020                 

CMS Stilo Helmet Owner's Kit

The ST5.1 GT Composite is Stilo's Snell 2020-compliant version of their best-selling Kevlar-Carbon composite helmets. With an autoclave molded shell, the ST5.1 GT Composite offers far superior safety compared to fiberglass and most composites from their competitors. You get all this without sacrificing comfort or features, as Stilo continues to focus on minimizing weight and maximizing flexibility.

With its large eyeport the Stilo ST5.1 GT Composite offers unsurpassed peripheral vision and all of the available tinted, mirrored, and iridium-colored visors (sold separately) have a center pinch-clip to make opening and closing easy, even while wearing nomex racing gloves.

Although updated to meet the newest Snell SA2020 certification, the Stilo ST5.1 GT retains its FIA 8858-2015 homologation as well. This makes the helmet legal for nearly all road race usage (except for those sanctioning bodies requiring FIA 8860 homologation).


The Stilo ST5.1 GT Composite is unsurpased in built-in flexibility. Its two side ports can be fitted with 3 different types of integrated communication electronics, forced air, helmet eject system, or a hydration system. Thanks to its innovative shell design, mounting and routing these options to the ST5.1 GT is sleek and seamless. When not in use, you don't even know the features are there.

Whether you're using side-mounted communications, side air, or a built-in hydration kit for staying hydrated during long enduro stints, everything is neat, tidy and completely out of the way when not needed. Stilo offers simply the best modular racing helmet on the market.

Industry-standard M6 threaded receivers are molded into the helmet shell to accommodate anchors for whichever head-and-neck restraint you use.

Size Note: We have found that customers who typically wear a size 59 helmet are most comfortable in size 60, which uses the large shell. Please order accordingly.

How to Measure Your Head for a Helmet


  • Includes noise attenuating earmuffs to reduce exterior noise and maximize effectiveness of communications with your crew.
  • Select communications, forced air, hydration or eject options now, or add them later.
  • New 2020 Snell Certification offers increased protection for all head forms at higher g-forces and speeds
  • All Existing Stilo ST5 shields and other accessories work on new ST5.1 SA2020 helmets
  • All sizes shown in centimeters


For the Carbon version of this helmet, see the Stilo Helmets ST5.1 GT Carbon Helmet.

For the FIA 8860-2018 version of this helmet, see the ultralight Stilo Helmets ST5 GT ZERO 8860-2018 Carbon Helmet, or the non-ZERO version for nearly half the cost by visiting the Stilo Helmets ST5 GT 8860-2018 Carbon Helmet.

An effective helmet is one that fits properly. Have an assistant use a dressmaker's tape or a piece of string to measure the circumference of your head, starting at a point about an inch above the eyebrows and around a point in the back of the head that results in the largest measurement, finally wrapping back around to the front. It's a good idea to take a few measurements and order your helmet based on the largest.

This helmet will ship to you with signature required for delivery.

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