CSF 13+ BRZ / 13-20 Toyota 86 / 22+ GR86 Aluminum Filler Neck w/ High Pressure Radiator Cap

Upgrade your cooling system with the CSF Aluminum Filler Neck w/ High Pressure Radiator Cap for the 2013+ Subaru BRZ, 2013-2020 Toyota 86, and 2022+ GR86. The factory plastic auxiliary filler neck is a known weak point, prone to cracking under heat and pressure. CSF's all-aluminum, 100% TIG-welded, mirror-polished replacement eliminates that risk while adding durability and a sleek, high-performance look under the hood.

This filler neck comes complete with a 1.4 bar high-pressure "mini style" radiator cap, embossed with the CSF logo. It provides increased system pressure for improved cooling efficiency and compatibility with most aftermarket caps if you choose to swap it. A true drop-in replacement, this upgrade installs in under 5 minutes with no modifications required — a simple, smart upgrade for any FRS, BRZ, or 86 build.