Koyorad Aluminium Filler Neck Subaru BRZ (ZC6) / Toyota 86 (ZN6)

Koyorad Aluminium Filler Neck - Subaru BRZ (ZC6) / Toyota 86 (ZN6)

Koyorad is a trusted name in cooling system components, and this aluminium filler neck is a straightforward upgrade over the factory plastic unit for the Subaru BRZ and Toyota 86. The OEM plastic piece is prone to steam erosion and cracking over time — swapping it for a mirror polished aluminium replacement eliminates that risk and tidies up the engine bay at the same time. As a bonus, it includes a built-in 1/8" PT sensor port, making it easy to add a coolant temperature sensor for a gauge or data logger.

This listing covers the Subaru BRZ (ZC6) and Toyota 86 (ZN6), spanning model years 2012 to 2021.

Important: This filler neck is not compatible with the OEM radiator cap. A new Type-A radiator cap must be purchased separately. Additionally, the sensor port accepts 1/8" PT threaded sensors only — it does not suit 1/8" NPT sensors. Confirm your sensor thread type before installation.

Key Features

• Direct replacement for the OEM plastic filler neck
• 100% aluminium construction — eliminates cracking and steam erosion
• Mirror polished finish
• Integrated 1/8" PT sensor port with plug included
• Compatible with coolant temperature sensors for gauges or data loggers

Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please ensure your vehicle's year, trim level, and configuration are confirmed before ordering.

Not sure if this suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.