Stilo ST5 Parts & Support — Genuine Replacement Parts NZ & AU

Stilo ST5 Parts & Support — Genuine Replacement Parts for Existing Owners

Supported by Aaron Harris — Barcelona 24 Hour class winner, Bathurst competitor, MSNZ licence examiner, and motorsport race engineer — and Rex Harris, RSM certified radio engineer. Harris Race Radios has been supplying motorsport safety equipment to NZ and AU competitors since 1975.

The Stilo ST5 helmet is no longer manufactured. Harris Race Radios continues to stock genuine ST5 replacement parts, electronics, visors, and accessories for existing ST5 helmet owners across New Zealand and Australia. If you are looking for a new helmet, the Stilo ST6 is the current flagship and direct successor to the ST5.

📖 Part of the Harris Race Radios Helmet Knowledge Centre

ST5 Parts We Stock

  • Visors — clear, tinted, and iridium replacement visors for ST5 F and ST5 FN variants. See our Stilo Visors & Peaks collection.
  • Electronics Kits — replacement speaker, microphone, and wiring kits for ST5 F helmets. See our Stilo Helmet Parts & Electronics collection.
  • Cheek Pads — replacement cheek pads in various thicknesses for custom fit adjustment.
  • Top Air Kits — ST5 top air system kits (round connector).
  • Visor Mounting Hardware — screws, pivot kits, and retention hardware for ST5 variants.
  • Hydration System — ST5-compatible hydration ports and tubes. See our Stilo Hydration & Air collection.

ST5 Electronics & Communications

Harris Race Radios stocks genuine ST5 electronics kits and adapter cables for existing ST5 helmet owners. Rex Harris (RSM certified radio engineer) can advise on the correct electronics kit and adapter cable for your specific ST5 model and radio or intercom system.

Read our Stilo communications setup guide → | Contact us for parts advice →

Upgrading from ST5 to ST6

If your ST5 is approaching the end of its service life or you are looking to upgrade, the Stilo ST6 is the natural successor — lighter, with improved aerodynamics, better electronics integration, and current FIA 8859-2024 and FIA 8860-2018 homologation.

  • ST6 is lighter than ST5 by approximately 200–300g (carbon variant)
  • ST6 GT has integrated sideports — the only helmet on the market with this feature
  • ST6 carries FIA 8859-2024 — the current standard for all NZ and AU series
  • Full electronics and intercom compatibility with all current Stilo intercom systems including DG-20 and DG WL-10

Browse Stilo ST6 Helmets → | Choosing the Correct Stilo Helmet →

Frequently Asked Questions

Is the Stilo ST5 still FIA homologated?
ST5 helmets homologated to FIA 8859-2015 expired at the end of 2023 for FIA competitions. If your ST5 carries FIA 8859-2015 only, it is no longer valid for FIA-sanctioned events. Check the homologation sticker inside your helmet and verify against the official FIA homologation list. Contact Aaron Harris (MSNZ licence examiner) if you need compliance advice.

Can I still use my ST5 for club racing in NZ or AU?
This depends on your specific series regulations. Some club series may still accept FIA 8859-2015 helmets — check with your series organiser or MSNZ/Motorsport Australia before competing. Contact us for advice.

Do you stock ST5 parts for all variants?
We stock parts for the ST5 F, ST5 FN, and ST5 F Offshore. Contact us with your specific helmet model and serial number and we will confirm availability.

Can I retrofit ST6 electronics into my ST5?
No — ST5 and ST6 electronics are not interchangeable. We stock genuine ST5 electronics kits for existing owners.

Do you ship ST5 parts to Australia?
Yes — we ship fast across New Zealand and Australia with tracked delivery.

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Harris Race Radios — NZ and AU motorsport communications and safety equipment specialists since 1975. Reviewed and updated June 2026. Contact us if you need parts advice for your specific ST5 model.