Stilo ST6 Composite vs Carbon — Which Should You Choose? NZ & AU

The Stilo ST6 Composite and ST6 Carbon are the two core circuit racing options in the ST6 range — both certified to FIA 8859-2024, both built on the same ST6 platform, but with meaningful differences in weight, certification, and price. This guide helps you choose the right shell for your racing category and budget.

Harris Race Radios is the Authorized Motorsport Helmet Dealer for New Zealand and Australia — radio engineers and motorsport communications specialists with over 50 years of experience since 1975.

Quick Answer

  • If weight saving is your priority and budget allows — choose the ST6 F Carbon. It is lighter, carries dual FIA 8859-2024 + Snell SA2025 certification, and is the definitive circuit racing helmet.
  • If you want FIA 8859-2024 certification at a lower price point — the ST6 F Composite delivers the same ST6 platform protection and fit at a more accessible price.

Full Comparison

Feature ST6 F Composite ST6 F Carbon
Shell material Composite Carbon fibre
FIA certification FIA 8859-2024 FIA 8859-2024
Snell certification Not included Snell SA2025
Weight From approx. 1230g Lighter — carbon shell reduces weight further
Shell sizes 3 shell sizes XS–XXXL 3 shell sizes XS–XXXL
Ventilation 6 chin bar vents + crown vents 6 chin bar vents + crown vents
Integrated electronics Stilo proprietary connector Stilo proprietary connector
HANS posts Not included (see ST6 F GT) Not included (see ST6 GTN Carbon)
MSNZ accepted Yes Yes
Motorsport Australia accepted Yes Yes
Best for Club to pro circuit racing Pro circuit racing, endurance, weight-sensitive drivers
Price $$$ $$$$

Who Should Choose the ST6 F Composite?

  • Circuit racers from club level through to professional competition who want FIA 8859-2024 certification
  • Drivers upgrading from an older FIA 8859-2015 or Snell SA2020 helmet
  • Competitors who want the ST6 platform at a more accessible price point
  • Drivers where weight saving is not the primary concern

Who Should Choose the ST6 F Carbon?

  • Professional and semi-professional circuit drivers who want the lightest possible helmet
  • Endurance and long-stint drivers where neck fatigue is a factor
  • Competitors requiring dual FIA 8859-2024 and Snell SA2025 certification
  • Drivers who want the absolute best Stilo circuit helmet available

What About the 8860 Carbon Options?

If you need the highest homologation standard available — FIA 8860-2018 — Stilo offers the ST6 GTN 8860 Carbon and ST6 GT 8860 Carbon. These exceed FIA 8859-2024 and are used at the highest levels of international motorsport.

Frequently Asked Questions

Is the ST6 Carbon worth the extra cost over the Composite?
For most club and national-level competitors, the ST6 F Composite provides excellent protection and fit at a lower price. The Carbon is worth the investment if weight saving matters to you — particularly for endurance racing or if you are sensitive to neck fatigue. The dual Snell SA2025 certification is also a meaningful advantage for some events.
How much lighter is the Carbon than the Composite?
Both start from approximately 1230g in the composite, but the carbon shell reduces weight further. Contact Harris Race Radios for current weight specifications on specific models.
Do both helmets use the same electronics?
Yes — both the ST6 F Composite and ST6 F Carbon use the same Stilo proprietary connector and are compatible with the same intercom and radio systems via adapter.
Which helmet do NZ circuit racers use?
Both the ST6 F Composite and ST6 F Carbon are popular with NZ circuit competitors. The Composite is the most common choice at club and national level. The Carbon is preferred by professional and endurance drivers. Harris Race Radios supplies and fits both across New Zealand and Australia.
Can I add HANS posts to the ST6 F Composite or Carbon?
The ST6 F Composite and ST6 F Carbon do not include HANS posts as standard. If you need HANS posts, see the ST6 F GT Composite or ST6 GTN Carbon.

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Harris Race Radios is the Authorized Motorsport Helmet Dealer for New Zealand and Australia — radio engineers and motorsport communications specialists with over 50 years of experience in the industry since 1975.