High performance 1.3 Bar (19psi) Hyper radiator cap for the Scion FR-S, Toyota GT86, and Subaru BRZ.
Koyorad Hyper Cap #SK-D13 allows an increase in the the cooling system pressure, which decreases the coolant’s boiling point.
This process maximizes the efficiency of the engine’s cooling system.
Note: Product not recommended for use with stock OEM radiator. This cap is intended for use with Koyorad all-aluminum radiator part #VH012663.