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Manley valve springs for Subaru WRX/STI EJ20/EJ25 applications are wound from premium alloy to support high-revving engines and demanding forced-induction setups. Engineered to maintain valvetrain stability at elevated RPM and boost, they pair with suitable retainers and hardware to handle aggressive cam profiles and revs up to the limits noted by Manley, providing durable control where aftermarket valvetrain upgrades are required.
Manley Subaru WRX/STI (EJ20/EJ25) Valve Springs (1.126/.640) *ONE SPRING*16.35
