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Regular Price: $98.20 - Instant discount: $8.20 = $90.00
Product Fitment:
2022-2026 Subaru BRZ
2022-2026 Toyota GR86
Upgrade your vehicle’s cooling system with the Koyorad Billet Aluminum Filler Neck — a premium replacement for OEM plastic filler necks that are prone to cracking and steam erosion. CNC-machined from billet aluminum and polished to a mirror finish, this neck offers superior durability, sensor compatibility, and a perfect OEM fit.
Designed with an integrated 1/8 PT sensor port, it accommodates most Japanese aftermarket temperature sensors and comes pre-fitted with a plug if not in use. The filler neck also accepts deep plunger-style pressure caps like the Koyorad SK-C13, offering improved pressure control and reliability.
Features:
CNC-machined billet aluminum construction
1/8 PT sensor port (with optional plug)
Accepts deep-plunger pressure caps (e.g., Koyorad SK-C13)
100% direct fit with OEM hoses and clamps
Mirror-polished finish
Built in Koyorad’s ISO 9001-certified factory
Benefits:
Eliminates failure-prone plastic necks
Resists steam erosion and cracking
Supports aftermarket temperature sensors
Enhances system reliability under pressure
Ideal for street, track, or performance builds needing durability and sensor integration without compromising fitment.
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