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Manley 16-piece valve spring set for Subaru WRX and STI applications, specified for use with 23180-16 retainers. Built to stabilize the valvetrain in high-revving turbocharged engines, the springs support demanding aftermarket camshafts and consistent control at elevated RPM and boost. Wound from a super-clean alloy and paired with Manley titanium retainers, the kit is rated to handle rev ranges up to 10,000 RPM.
Manley Subaru WRX/STI 16pc Valve Springs (1.050/.755) (for use with 23180-16 Retainers)
