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

The Stilo ST5 and ST6 are two racing helmet platforms from Stilo, built for different levels of competition and carrying different homologation standards. This guide breaks down key differences so you can choose the right helmet for your racing category, budget, and communications setup.

Harris Race Radios can advise on Stilo helmet selection and motorsport communications for your specific setup. Check availability of individual ST5 and ST6 models before ordering.

ST5 vs ST6 — Quick Answer

  • If you are competing in events requiring FIA 8859-2024 certification, check the homologation of the specific ST6 model. The ST5 models discussed here are certified to FIA 8859-2015; check whether your event still accepts that standard.
  • If your event still accepts FIA 8859-2015, the ST5 may be an option.
  • If you want the latest ventilation, padding, and shell technology, compare the ST6 models.

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
MSNZ accepted Check current regs Check current regs for the model and category
Motorsport Australia accepted Check current regs Check current regs for the model and category
Price $$ $$$

Who Should Choose the ST5?

  • Competitors whose event regulations still accept FIA 8859-2015 certification
  • Drivers on a tighter budget who need a 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:

Once you've chosen the ST6, the next decision is shell material. See our Stilo ST6 Composite vs Carbon — Which Should You Choose? →

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. Always check your current event regulations with your series organiser or controlling body before purchasing.

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?
The ST6 offers changes to ventilation, fit, padding, and homologation. If your event requires FIA 8859-2024, check the specific model's certification before upgrading.

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 options for NZ rally competitors. Confirm the exact model's homologation and communications fitment before purchase. Harris Race Radios can advise on both in New Zealand and Australia.

Related Guides

Shop ST5 and ST6 Helmets

Harris Race Radios. Written by Aaron Harris (MSNZ Licence Examiner, active racing driver and race engineer) and Rex Harris (qualified Radio Telecommunications Engineer, Approved Radio Certifier for NZ RSM and AU ACMA). Always verify current series regulations with your series organiser, Motorsport Australia, or MSNZ before purchasing.