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Manley valve spring and retainer kit for Subaru WRX/STI is engineered to make the valvetrain race‑ready, using chrome‑silicon alloy springs for exceptional fatigue resistance and high tensile strength. Kits include matched springs and titanium retainers where specified, and are designed to handle aggressive aftermarket camshafts and valve control at extreme RPMs for dependable operation in high‑revving applications.
Manley Subaru WRX/STi Valve Spring and Retainer Kit (w/o Valve Locks) (16 each)
