Manley 42379-16 Valve Spring Seat CUP-OD 1.650

Manley Valve Spring Seat, ring Cup - OD 1.650 Manley Performance Valve Spring Cups provide a precision-machined, durable foundation for valve springs while protecting the cylinder head from spring wear. Manufactured from premium materials and held to exacting tolerances, they help maintain proper spring alignment for reliable valvetrain performance in both street and racing applications.