Koyo 13-16 Scion FR-S / Subaru BRZ Aluminum Filler Neck

These billet aluminum neck assemblies eliminate steam erosion and cracks common with plastic filler necks. Each of these necks features an integrated 1/8 PT sensor port to fit with sensors provided by most Japanese temperature gauge manufacturers. Koyo designed these to replace the vehicle's factory filler neck to accept the more robust, deep plunger-type pressure cap.