Koyo Aluminum Radiator Filler Neck 2013-2019 BRZ / 2013-2016 FR-S / 2017-2019 GT86

Upgrade your Subaru BRZ, FR-S, or GT86 cooling system with the Koyo Aluminum Radiator Filler Neck, a premium replacement designed to enhance durability and style. This all-aluminum filler neck replaces the factory plastic neck, providing a stronger, longer-lasting component that stands up to daily driving and performance demands. Its sleek mirror-polished finish adds a clean, professional look under the hood.

Crafted with 100% TIG-welded construction, this filler neck is a direct drop-in replacement requiring no modifications and installs in under five minutes. Note that it is incompatible with the OEM pressure cap and requires the Koyorad SK-C13 type or a deep plunger equivalent cap for proper use. Ideal for Subaru enthusiasts seeking a reliable cooling upgrade, this part ensures your cooling system performs optimally while adding a touch of quality craftsmanship.

Perfect for daily drivers and performance builds alike, the Koyo Aluminum Radiator Filler Neck is a smart upgrade for your 2013-2019 BRZ, 2013-2016 FR-S, or 2017-2019 GT86. Shop now at Subimods and experience a lasting improvement in your cooling setup.