CSF Subaru BRZ / Toyota GR86 Aluminum Filler Neck w/1.4BAR MINI Cap

A well-known problem with the factory radiator filler neck on this platform is that it's genuinely prone to breaking when removing the radiator for maintenance or replacement, and cracking over time due to lower-quality factory materials, exactly the wrong failure point to discover mid-service. CSF's All-Aluminum Filler Neck replaces the weak plastic auxiliary filler neck entirely with a 100% TIG-welded, mirror-polished aluminium version built to last.

It comes complete with a 1.4 bar high-pressure cap in a high-quality "mini style" design, embossed with the CSF logo, a cap style commonly used across high-performance aftermarket options, so you can easily switch to a different brand cap later if you prefer without needing a different neck. An integrated 1/8 NPT sensor port comes pre-installed with an optional plug, ready for aftermarket sensors if you want to add one down the line. This is a genuine easy drop-in replacement requiring no modifications, and can be installed in less than 5 minutes.

Works with: OEM mounting location. Compatible with most high-performance aftermarket radiator caps sharing the same mini-style fitment.

Why Choose This Filler Neck

• Directly addresses a well-known OEM failure point, breakage during radiator removal or maintenance
• 100% TIG-welded, mirror-polished aluminium construction, genuinely built to last
• Includes a 1.4 bar high-pressure mini-style cap, embossed with the CSF logo
• Compatible with most aftermarket high-performance caps sharing the same fitment
• Integrated 1/8 NPT sensor port, pre-plugged and ready for aftermarket sensors
• Genuine 5-minute install, no modifications required

Compatibility

• Subaru BRZ (2013-2024)
• Scion FR-S (2013-2016)
• Toyota 86 (2017-2020)
• Toyota GR86 (2022+)