Stilo ST6 F Carbon Helmet

The Stilo ST6 F Carbon Helmet is the flagship of the ST6 circuit racing range — dual certified to FIA 8859-2024 and Snell SA2025, built from an ultra-lightweight PURO Super Smooth carbon fibre shell developed through World Endurance Championship and Formula One programmes. If you are competing in circuit racing, hillclimb, or any FIA-sanctioned series in NZ or Australia, this is the benchmark helmet.

Looking for the composite shell? See the ST6 F Composite — same FIA 8859-2024 and SA2025 certification at a lower price point. For GT and endurance racing with sun visor and HANS posts, see the ST6 F GT Composite.

Technical Specifications

Shell — PURO Super Smooth Carbon Fibre

The ST6 F Carbon uses Stilo's proprietary PURO Super Smooth carbon fibre manufacturing process — a specialised layup technique that produces a flawless shell finish directly from the mould, eliminating the need for traditional clear coats, lacquers, or heavy fillers.

Why it matters: Conventional carbon helmets require a lacquer or filler layer to achieve a smooth finish, adding weight that serves no structural purpose. PURO removes this entirely, trimming crucial grams from the finished helmet. Over a long race, even small reductions in helmet weight directly reduce neck muscle fatigue and strain — a measurable performance and safety benefit.

Weight

From 1,230 g (size XS/54, shell size dependent). Larger shell sizes will be marginally heavier.

Why it matters: At 1,230 g, the ST6 F Carbon is among the lightest FIA 8859-2024 certified helmets available. 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.

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 Carbon carries both — future-proofing your investment as series regulations transition to the newer standards through 2025–2027.

Shell Construction

3-shell carbon fibre construction — 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.

Sizes Available

XS (54), S (55), M (57), L (58), L (59), XL (61), XXL (63), XXXL (64). 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 Carbon 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 Carbon 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

What is PURO technology on the Stilo ST6 F Carbon?
PURO Super Smooth is Stilo’s proprietary carbon fibre manufacturing process. It produces a flawless shell finish from the mould, eliminating clear coats, lacquers, and fillers — removing non-structural weight and reducing neck strain and fatigue over a race distance.

How much does the Stilo ST6 F Carbon weigh?
From 1,230 g for the smallest shell size (XS/54). Weight increases marginally with larger shell sizes.

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

What is the difference between the ST6 F Carbon and ST6 F GT Composite?
The ST6 F Carbon is the circuit racing flagship — standard clear visor, PURO carbon shell. The ST6 F GT Composite has a removable sun visor and factory-fitted HANS posts, designed for GT class and endurance racing.

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

Is the ST6 F Carbon legal for MSNZ events in New Zealand?
Yes — FIA 8859-2024 and Snell SA2025 both accepted by MSNZ. Aaron Harris is an MSNZ Licence Examiner for helmets.

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

Watch: Why Safety Gear Saves Lives — Aaron Harris Manfield Crash

Aaron Harris — professional race driver, race engineer, and MSNZ helmet fitting specialist — was involved in a serious crash at Manfield. He walked away. This is why the helmet you choose matters.

Aaron Harris — Manfield crash, NZ. Full safety gear: Stilo helmet, HANS device, FIA-rated racewear. He walked away.