Replace the weak plastic auxiliary filler neck of your GR86/BRZ with an all-aluminum 100% TIG-welded and mirror polished upgraded version from CSF. Complete with a 1.4bar high-pressure cap with a high-quality “mini style” radiator cap, embossed with the CSF logo. This cap style is most commonly used with high-performance aftermarket caps if you wish to replace the CSF cap with another brand.

Easy drop-in replacement with no modifications – can be installed in less than 5 minutes.

Also features a 1/8" NPT port which comes plugged off out of the box. This plug can be removed to fit a coolant temperature sensor easily.