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Manley valve spring and retainer kit for Subaru WRX/STi provides matched chrome-silicon valve springs and titanium retainers (retainers for this kit are titanium) to prepare valvetrains for aggressive camshafts. The kit lists a max lift of 0.510 in, includes components finished to exacting tolerances, and is engineered for durability and fatigue resistance. Manley notes these kits are intended to handle high rpm use and are CNC machined for consistency.
Manley Subaru WRX/STi .490in Valve Spring and Retainer Kit (w/o Valve Locks) (16 each)
