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Koyorad Aluminum Coolant Filler Neck | BRZ & FR-S (FN2320)

Erik Blume  septiembre 17 2019

FR-S and BRZ All-Aluminum Coolant Filler Neck from Koyo

Koyorad introduces an all-aluminum coolant filler neck for the 2013-2016 Scion FR-S and Subaru BRZ. This is an all-aluminum upgrade to the stock plastic piece with many features built into the design.


Koyo Coolant Filler Neck


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  • Billet aluminum eliminates steam erosion and cracking common with plastic filler necks
  • Integrated 1/8 PT sensor port (supplied with optional plug) to fit with sensors provided by most Japanese temperature gauge companies
  • Conversion of radiator cap style to the more durable deep plunger type - Koyorad #SK-C13 or equivalent (OEM cap will not fit, cap not included)
  • Direct replacement for a quick installation; a direct replacement for the stock plastic filler neck and can use the OEM hoses and clamps


MAPerformance knows the hunger to build that FR-S or BRZ to its maximum potential. We also know getting there can be tricky! Feel free to give us a call or swing by live chat to get all those tricky questions answered quickly.

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