Stilo ST6 GT Carbon Racing Helmet - FIA8860

Name: Stilo ST6 GT Carbon Racing Helmet - FIA8860
Brand: Stilo
Price: 3199.95 USD
Availability: InStock
Rating: 4.67 (3 reviews)

$3,199.95 USD

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Size 54 55 57 58 59 61 63 64

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The Stilo ST6 GT Carbon Helmet delivers elite protection and advanced functionality for closed-cockpit racers, meeting the stringent FIA 8860-2018 standard. Constructed from a premium carbon fiber shell, it balances extreme strength with impressive weight savings. Designed with integrated side ports, the ST6 GT supports seamless radio communication and hydration setups, making it ideal for endurance, GT, and prototype drivers. Its narrow eyeport enhances frontal impact resistance and glare control, while the aerodynamic profile ensures stability at speed. With HANS-ready M6 terminals and a customizable fire-retardant liner, the ST6 GT Carbon is purpose-built for high-performance motorsport.

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Head measurements vary by brand. Measure the widest part of your head above the ears.

Size	Inches	CM	Hat Size
XS	20-7/8 - 21-1/4	53-54	6-5/8, 6-3/4
S	21-5/8 - 22	55-56	6-7/8, 7
M	22-3/8 - 22-3/4	57-58	7-1/8, 7-1/4
L	23-1/4 - 23-5/8	59-60	7-3/8, 7-1/2
XL*	24 - 24-3/8	61-62	7-5/8, 7-3/4

Size	Inches	CM	Hat Size
XXS	21-1/2 - 21-5/8	54-55	6-3/4, 6-7/8
XS	22	56	7
S	22-3/8	57	7-1/8
M	22-3/4 - 23-1/4	58-59	7-1/4, 7-3/8
L	23-5/8	60	7-1/2
XL	24 - 24-3/8	61-62	7-5/8, 7-3/4
XXL	24-3/4 - 25-1/4	63-64	7-7/8, 8
3XL	25-5/8 - 26	65-66	8-1/8, 8-1/4
4XL	26-3/8 - 26-3/4	67-68	8-3/8, 8-1/2

Size	Inches	CM	Hat Size
XXS	21-1/2 - 21-5/8	54-55	6-3/4, 6-7/8
XS	22	56	7
S	22-3/8	57	7-1/8
M	22-3/4 - 23-1/4	58-59	7-1/4, 7-3/8
L	23-5/8	60	7-1/2
XL	24 - 24-3/8	61-62	7-5/8, 7-3/4
XXL	24-3/4 - 25-1/4	63-64	7-7/8, 8

Size	Inches	CM	Hat Size
XS	20-7/8 - 21-1/4	53-54	6-5/8, 6-3/4
S	21-5/8 - 22	55-56	6-7/8, 7
M	22-3/8 - 22-3/4	57-58	7-1/8, 7-1/4
L	23-1/8 - 23-1/2	59-60	7-3/8, 7-1/2
XL	23-7/8 - 24-1/4	61-62	7-5/8, 7-3/4
XXL	24-3/4 - 25-1/8	63-64	7-7/8, 8

Size	Inches	CM	Hat Size
XS	21-1/4 - 21-5/8	54-55	6-3/4, 6-7/8
S	22 - 22-1/2	56-57	7, 7-1/8
M	22-7/8 - 23-1/4	58-59	7-1/4, 7-3/8
L	23-5/8 - 24	60-61	7-1/2, 7-5/8
XL	24-3/8 - 24-3/4	62-63	7-3/4, 7-7/8
XXL	25-1/4 - 25-5/8	64-65	8, 8-1/8

Size	Inches	CM	Hat Size
XXS	21-1/2 - 21-5/8	54-55	6-3/4, 6-7/8
XS	22	56	7
S	22-3/8	57	7-1/8
M	22-3/4 - 23-1/4	58-59	7-1/4, 7-3/8
L	23-5/8	60	7-1/2
XL	24 - 24-3/8	61-62	7-5/8, 7-3/4
XXL	24-3/4 - 25-1/4	63-64	7-7/8, 8

Size	Inches	CM	Hat Size
XXS	20 - 20-1/2	51-52	6-3/8, 6-1/2
XS	20-7/8 - 21-1/4	53-54	6-5/8, 6-3/4
S	21-5/8 - 22-1/16	55-56	6-7/8, 7
M	22-7/16 - 22-7/8	57-58	7-1/8, 7-1/4
L	23-1/4 - 23-5/8	59-60	7-3/8, 7-1/2
XL	24 - 24-3/8	61-62	7-5/8, 7-3/4
XXL	24-13/16 - 25-3/16	63-64	7-7/8, 8
3XL	25-1/2+	65+	8-1/8

Size	CM	Hat Size
XS	54	6-3/4
S	56	7
M	59	7-3/8
L	60	7-1/2
XL	61	7-5/8
XXL	63	8

Size	Inches	CM	Hat Size
XS	21.25	54	6-3/4
S	21.65	55	6-7/8
M	22.45	57	7-1/8
L	22.8 - 23.25	58-59	7-1/4, 7-3/8
L+	23.6 - 24	60-61	7-1/2, 7-5/8
XL	24.4	62	7-3/4
XXL	24.8	63	7-7/8

Size	Inches	CM	Hat Size
XS	20-3/4 - 21-1/4	53-54	6-5/8, 6-3/4
S	21-1/2 - 21-7/8	55-56	6-7/8, 7
M	22-1/4 - 22-5/8	57-58	7-1/8, 7-1/4
M/L*	23 - 23-1/2	59-60	7-3/8, 7-1/2
L	23 - 23-1/2	59-60	7-3/8, 7-1/2
XL	23-7/8 - 24-1/4	61-62	7-5/8, 7-3/4

Actually Measuring Your Head

Use a soft measuring tape (craft store, like $3). Wrap it around the widest part of your dome, forehead to back, and get the same number twice. Use that number to pick your size. Revolutionary, we know. lol.

Guide to Buying a Racing Helmet

5 stars: 2 (67%)
4 stars: 1 (33%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Wore the ST6 GT for a full GT3 season

Never had a fogging issue. Radio integration worked cleanly all year. Comfortable and well made. No complaints.

The dual lock visor is a proper upgrade

The ST5 visor would rattle slightly at speed. The ST6 doesn't. That alone was worth the switch. Good helmet overall.

10 percent lighter than my ST5 GT

Upgraded and you feel the difference immediately. New vents fix the fogging I had on hot circuits. Integrated comms work cleanly all year.