Stilo ST5.1 GT Carbon Fiber Helmet SA2020 1 "a"

$2,038.95 $2,266.00 -11% OFF


Stilo ST5.1 GT Carbon Fiber Helmet SA2020

$2,038.95 $2,266.00 -11% OFF



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Helmet Shape and Fit

Stilo ST5.1 GT Carbon SA2020 Helmet

The ST5.1 GT Carbon is Stilo's Snell SA2020-compliant version of their best-selling carbon helmet. With an autoclave molded carbon fiber shell, the ST5.1 GT Carbon offers strength superior to fiberglass and composites while minimizing weight.

With its large eyeport, the Stilo ST5.1 GT Carbon 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 Carbon 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).

CMS Stilo Helmet Owner's Kit


The Stilo ST5.1 GT Composite is unsurpased in built-in flexibility. Its two side ports can be fitted with three 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


  • Noise attenuating earmuffs to reduce exterior noise

  • Ports for integrated communications, forced air, or hydration

  • SA2020 Snell certification offers increased protection

  • All existing Stilo ST5 shields and other Stilo accessories work on new ST5.1 SA2020 helmets


For the composite version, see the Stilo Helmets ST5.1 GT Composite Helmet.

For the FIA 8860-2018 version, see the Stilo Helmets ST5 GT Zero 8860-2018 Carbon Helmet.

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

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

The Ultimate Auto Racing Helmet Buyer's Guide

We’ve sold tens of thousands of helmets here at Competition Motorsport and, in the process of doing that, answered a million questions (probably) about them. With that in mind, this article will give you the real lowdown on selecting a proper auto racing helmet. We’ll go over the why’s and how’s of size, shape, certification, pricing, features, and maintenance so you have the tools you need to select the perfect helmet.

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