Stilo ST6 F Composite Helmet

The Stilo ST6 F Composite Helmet is the composite shell option in the ST6 circuit racing range — dual certified to FIA 8859-2024 and Snell SA2025, with integrated Stilo electronics, advanced ventilation, and a lightweight composite shell. Up to 11% lighter than the previous ST5 F Composite, it delivers the latest safety certification at a lower price point than the carbon shell. If you are competing in circuit racing, hillclimb, or any FIA-sanctioned series in NZ or Australia, this is the benchmark composite helmet.

Looking for the carbon shell? See the ST6 F Carbon — same FIA 8859-2024 and SA2025 certification, ultra-lightweight PURO carbon fibre shell for maximum weight saving. For GT and endurance racing with sun visor and HANS posts, see the ST6 F GT Composite.

Technical Specifications

Shell — Lightweight Composite

The ST6 F Composite uses a lightweight composite shell — three distinct shell sizes cover the full size range (XS through XXXL), ensuring the shell geometry is optimised for each head size rather than stretching a single shell across all sizes.

Why it matters: A properly sized shell improves both comfort and protection. The composite construction meets the full structural requirements of FIA 8859-2024 at a lower price point than carbon, making it the right choice for competitors who want the latest certification without the carbon premium.

Weight

From approximately 1,230 g (small shell, shell size dependent). Up to 11% lighter than the previous ST5 F Composite. Larger shell sizes will be marginally heavier.

Why it matters: In a high-G cornering environment, a heavier helmet amplifies the load on the neck and cervical spine — lighter helmets reduce fatigue, improve comfort over race distance, and reduce injury risk in an impact. The ST6 F Composite delivers meaningful weight savings over its predecessor.

Certifications — FIA 8859-2024 & Snell SA2025 (Dual Homologated)

FIA 8859-2024 is the current FIA homologation standard for circuit racing helmets, replacing FIA 8859-2015. It introduces more stringent impact attenuation, penetration resistance, and retention system testing than its predecessor.

Snell SA2025 is the current Snell Memorial Foundation standard for automotive racing helmets. Snell certification involves independent third-party testing — helmets are purchased off the shelf and tested without manufacturer involvement, making it one of the most rigorous independent certification processes in motorsport.

Why dual certification matters: Most helmets carry one standard. The ST6 F Composite carries both — future-proofing your investment as series regulations transition to the newer standards through 2025–2027.

Ventilation

Six chin bar vents plus crown vents and padding channels for maximum airflow. Special channels in the padding enhance airflow through the helmet interior, keeping you cooler and reducing fatigue over long race events.

Integrated Radio Electronics

Adjustable dynamic noise-cancelling microphone and built-in radio connection port for clear, uninterrupted crew communication. In-ear speaker connection with integral wiring and connector for seamless integration of in-ear speakers.

Visor

High-performance anti-fog visor with permanent washable treatment, refined pivot for smoother operation, and one-hand locking mechanism — meets FIA 8859-2024 in both fully closed and ventilated positions. Wider aperture for improved downward visibility of dashboard and cockpit controls.

Additional Features

Updated cheek padding with customisable thickness options (available separately) for a tailored fit. FHR posts factory fitted. Drinks system ready — prepared for hydration tube integration. Compatible with optional Stilo Top Air System.

Sizes Available

XS (54), S (55), M (57), L (58), L (59), XL (61), XXL (63), XXXL (64). Available in Gunmetal Gray and White. If you are between sizes or unsure, contact Aaron Harris — MSNZ Licence Examiner for helmets, he fits helmets regularly and can advise on correct sizing for your head shape.

Audio Connector — How It Works

The ST6 F Composite uses Stilo's proprietary EzyFlow audio connector. Select your audio connector option on this page. Harris Race Radios fits your chosen connector directly to the helmet before dispatch.

• EarMuff / Speakers — Large padded ear cups with built-in speakers. Best for noisy environments — circuit, GT, endurance, and off-road. Provides passive noise isolation alongside clear audio. Most popular for loud cockpits.
• Stilo Earbud Connector — Stilo's proprietary push-lock connector, exclusive to Stilo helmets. Not compatible with third-party earpieces without an adapter.
• 3.5mm Mono Connector — The most widely used audio connector in NZ, Australia, and the USA. Compatible with the majority of aftermarket earpieces and radio setups. The go-to choice for non-Stilo custom earpieces.
• RCA Connector — Predominantly used in European race teams and systems. Check your audio input type before selecting.

Not sure which connector suits your setup? Contact us and we'll match you to the right option.

Why Harris Race Radios for Your Stilo Helmet

Harris Race Radios is NZ and AU's most experienced Stilo specialist — genuine Stilo stock sourced directly through Stilo's supply chain, held locally in NZ for fast dispatch and shipped to Australia with tracked courier.

Rex Harris — qualified Radio Telecommunications Engineer, Approved Radio Certifier for NZ RSM and AU ACMA, motorsport radio experience since 1975 starting at the Marlboro Series Grand Prix. Rex's engineering background means every comms fitment is done correctly — not just plugged in.

Aaron Harris — active racing driver and race engineer: Barcelona 24 Hour 1st in class 2013, Bathurst 1000 and 12 Hour competitor, BMW Race Driver Series Champion 2011 (241 starts, 39 wins), race engineer for Earl Bamber Motorsport, TekworkX, Matt Stone Racing, and Porsche Carrera Cup Australia, Asia-Pacific and New Zealand. MSNZ Licence Examiner for helmets, racewear, FHR, and HANS devices. Aaron fits and races in this equipment — his advice is based on real-world experience, not a spec sheet.

NZ stock held locally for fast dispatch. Ships to Australia with tracked courier. Contact us to confirm compliance for your series before ordering.

Motorsport Compliance — NZ & Australia

The Stilo ST6 F Composite holds current FIA 8859-2024 and Snell SA2025 homologation — accepted by Motorsport Australia (CAMS) and Motorsport New Zealand (MSNZ) for circuit racing, rally, and FIA-sanctioned events. Aaron Harris is an MSNZ Licence Examiner for helmets — contact us if you need compliance confirmation for your series or licence category.

Which Stilo ST6 Helmet Is Right for You?

Frequently Asked Questions

Is the ST6 F Composite legal for MSNZ and Motorsport Australia events?
Yes — FIA 8859-2024 and Snell SA2025 certified. Accepted by MSNZ and Motorsport Australia for circuit racing. Always verify current series regulations with your organiser.

What is the difference between the ST6 F Composite and ST6 F Carbon?
Both carry FIA 8859-2024 and SA2025 certification. The Composite uses a lightweight composite shell at a lower price point. The Carbon uses Stilo's PURO Super Smooth carbon fibre shell for maximum weight saving. If weight is your priority, choose the Carbon.

What is the difference between the ST6 F Composite and ST6 F GT Composite?
Both carry FIA 8859-2024 and SA2025 certification with the same composite shell. The GT Composite has a removable sun visor and factory-fitted HANS/FHR posts. Choose the GT if you race in GT class or endurance events.

What is the difference between the ST6 F and ST6 FN?
The ST6 F comes with factory Stilo integrated electronics — Harris Race Radios fits your chosen audio connector before dispatch. The ST6 FN is a naked shell — Harris Race Radios fits your preferred aftermarket or team-spec intercom system directly to the shell.

What connector options are available?
EarMuff/Speakers, Stilo Earbud, 3.5mm Mono, or RCA. Select on this page — Harris Race Radios fits your chosen connector before dispatch. Contact us for advice on which suits your system.

How do I choose the right size?
Measure the widest circumference of your head above the ears in centimetres. When in doubt, size down — racing helmets should fit firmly with no movement. Contact Aaron Harris — MSNZ Licence Examiner for helmets — for sizing advice based on your head shape.

Is the ST6 F Composite legal for Motorsport Australia (CAMS) events?
Yes — FIA 8859-2024 homologation accepted by Motorsport Australia for circuit racing and rally events.

Do you hold stock in NZ and ship to Australia?
Yes — NZ stock held locally for fast dispatch. Australian orders ship with tracked courier.