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The Ferrea valve spring kit for 2012–2015 Scion FR-S and Subaru BRZ models is a single-spring replacement set tailored to those platforms. This single-coil option swaps in for factory springs to restore or maintain reliable valve control in naturally aspirated or mildly tuned engines, providing a compact valvetrain solution that matches the FR-S/BRZ engine architecture.
Ferrea 12-15 Scion/Subaru FR-S/BRZ Single Spring Kit
