Stilo ST5 vs ST6 — Which Helmet Should You Choose? NZ & AU Guide

The Stilo ST5 and ST6 are the two most popular racing helmet platforms from Stilo — but they are built for different levels of competition and carry different homologation standards. This guide breaks down every key difference so you can choose the right helmet for your racing category, budget, and communications setup.

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. We stock the full Stilo ST5 and ST6 range and can advise on the right helmet for your specific setup.

ST5 vs ST6 — Quick Answer

  • If you are competing in events requiring FIA 8859-2024 certification — you need the ST6. The ST5 is certified to FIA 8859-2015, which is being phased out by many sanctioning bodies.
  • If you are on a budget and your event still accepts FIA 8859-2015 — the ST5 remains a strong, proven option.
  • If you want the latest ventilation, padding, and shell technology — the ST6 is a significant upgrade in every area.

Full Comparison

Feature Stilo ST5 Stilo ST6
Homologation FIA 8859-2015 FIA 8859-2024
Snell certification SA2020 (select models) SA2020 / SA2025 (model dependent)
Shell options Composite, Carbon Composite, Carbon, 8860 Carbon
Shell sizes 2 shell sizes 3 shell sizes — more precise fit
Weight (composite) From approx. 1350g From approx. 1230g — up to 11% lighter
Ventilation Standard chin bar vents Redesigned — 6 chin bar vents + crown vents
Visor aperture Standard Wider — improved downward visibility
Padding Standard Redesigned — improved cable routing, better cheek/chin interlock
Integrated electronics Stilo WRC system (FN/GT models) Stilo WRC system (FN/GT/GTN models) — updated connector
HANS posts FN, GT, GTN models FN, GT, GTN models
Accessory range ST5 accessories Exclusive ST6 range — new visors, screw kits, aerodynamic components
MSNZ accepted Check current regs Yes — FIA 8859-2024 accepted
Motorsport Australia accepted Check current regs Yes — FIA 8859-2024 accepted
Price $$ $$$

Who Should Choose the ST5?

  • Competitors whose event regulations still accept FIA 8859-2015 certification
  • Drivers on a tighter budget who need a proven, reliable Stilo helmet
  • Competitors who already own an ST5 and are not yet required to upgrade

Who Should Choose the ST6?

  • Competitors whose event regulations require FIA 8859-2024 certification
  • Drivers who want the latest ventilation, padding, and shell technology
  • Competitors who want a more precise fit from three shell sizes
  • Drivers upgrading from an older ST5 or equivalent helmet
  • Anyone competing in MSNZ or Motorsport Australia events where FIA 8859-2024 is required or preferred

ST6 Range — Which Model?

Once you have decided on the ST6, the next step is choosing the right variant for your racing category:

Not sure which ST6 variant suits you? Read our How to Choose a Stilo Helmet — NZ & AU Guide.

Frequently Asked Questions

Is the Stilo ST5 still legal for MSNZ and Motorsport Australia events?
The ST5 is certified to FIA 8859-2015. Whether it is accepted depends on your specific event and class regulations. Many events are now requiring FIA 8859-2024 (ST6). Always check your current event regulations before purchasing. Contact Harris Race Radios if you are unsure.
How much lighter is the ST6 than the ST5?
The ST6 composite shell is up to 11% lighter than the equivalent ST5 composite, starting from approximately 1230g. The ST6 carbon variants are lighter still.
Is the ST6 worth the upgrade from the ST5?
Yes — the ST6 is a significant improvement in ventilation, fit precision, padding, and homologation. If your event requires FIA 8859-2024, the upgrade is mandatory. If not, the ST6 still offers meaningful improvements in comfort and weight that most drivers notice immediately.
Do both helmets use the same intercom electronics?
Both the ST5 and ST6 use Stilo WRC electronics in their rally and GT variants. The ST6 uses an updated connector specification. Contact Harris Race Radios to confirm compatibility with your existing intercom system before upgrading.
What helmet do NZ rally drivers use?
The Stilo ST6 FN Composite and Venti4 WRC Composite are the most popular choices among NZ rally competitors. Both are FIA 8859-2024 certified and include integrated WRC electronics and HANS posts. Harris Race Radios supplies and fits both across New Zealand and Australia.

Shop ST5 and ST6 Helmets

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. Trusted by competitors from club days through to professional championship events.