Stilo ST6 F Offshore Helmet

The Stilo ST6 F Offshore Helmet is purpose-built for offshore and powerboat racing — a high-visibility orange composite shell certified to FIA 8859-2024 and Snell SA2025, with Stilo's integrated radio electronics and dynamic noise-cancelling microphone built in. If you are competing in offshore, powerboat, or open-water racing in NZ or Australia, this is the benchmark helmet.

Looking for a circuit racing helmet? See the ST6 F Composite — same FIA 8859-2024 and SA2025 certification for circuit use. For the lightest carbon shell, see the ST6 F Carbon.

Technical Specifications

Shell — Composite

The ST6 F Offshore uses a lightweight composite shell in a high-visibility orange finish — purpose-designed for offshore and open-water racing environments where rescue identification is a critical safety requirement.

Why it matters: In an offshore racing incident, a high-visibility helmet dramatically improves the speed of rescue identification on the water. The composite shell delivers the structural protection required by FIA 8859-2024 at a weight that reduces neck fatigue over long offshore events.

Weight

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

Why it matters: Offshore racing involves sustained high-speed operation over extended distances. A lighter helmet reduces neck muscle fatigue and strain over the course of a long event — a measurable performance and safety benefit.

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

FIA 8859-2024 is the current FIA homologation standard for 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 Offshore carries both — future-proofing your investment as series regulations transition to the newer standards through 2025–2027.

Shell Construction

3-shell composite 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.

Integrated Radio Electronics

The ST6 F Offshore includes Stilo's integrated radio electronics with an adjustable dynamic noise-cancelling microphone and built-in radio connection port — essential for clear crew communication in the high-noise environment of offshore racing.

Additional Features

Six chin bar vents plus crown vents and padding channels for maximum airflow during long offshore events. High-performance anti-fog visor with washable treatment, smoother pivot, and one-hand locking. Wider aperture for improved downward visibility. FHR post receptacles fitted — HANS/FHR posts not included but easily retrofitted. Drinks system ready — prepared for hydration tube integration.

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 Offshore 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 — offshore, powerboat, and open-water racing. 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 Offshore holds current FIA 8859-2024 and Snell SA2025 homologation — accepted by Motorsport Australia (CAMS) and Motorsport New Zealand (MSNZ) for offshore and powerboat racing 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 Offshore approved for offshore and powerboat racing in NZ and AU?
Yes — FIA 8859-2024 and Snell SA2025 are both accepted standards under MSNZ and Motorsport Australia for offshore and powerboat racing. Always confirm your specific event or class regulations with your organiser.

Does this helmet include HANS posts?
FHR post receptacles are fitted to the shell but FHR posts are NOT included. They can be easily retrofitted — contact Harris Race Radios for options.

Can I use this helmet with my existing radio or intercom system?
Yes, in most cases. Select the audio connector variant that matches your system. If you're unsure, contact us and we'll confirm compatibility before you order.

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.

What is the weight of the ST6 F Offshore?
From approximately 1,230 g for the small shell. Up to 11% lighter than the previous ST5 F Offshore. Weight varies slightly by shell size.

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

Is the ST6 F Offshore 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.