PAC Racing Springs PAC-S133-16 Chromoly Valve Spring Retainers, 1.650 in OD, Set of 16

PAC Racing Springs PAC-S133-16 steel chromoly valve spring retainers are designed for performance engine applications that require reliable spring location and durable valvetrain support. These inside-style spring seats provide a stable interface between the valve spring and cylinder head while helping maintain proper spring alignment during operation. Manufactured from chromoly steel, the retainers offer the strength and durability needed for demanding racing and high-performance use.
The PAC-S133-16 retainers feature a 1.650 in outside diameter, a 0.570 in inside diameter, and a 0.630 in spring inside diameter. Their 0.030 in thickness provides a solid, dependable seating surface without unnecessary bulk. The precision-focused design makes these spring seats suitable for builders and technicians seeking consistent fitment with compatible PAC Racing Springs valvetrain components.
This set includes 16 valve spring retainers, providing enough pieces for a complete V8 application when matched with the appropriate cylinder head, valve spring, and retainer specifications. Confirm the spring seat style, valve spring dimensions, and cylinder head compatibility before installation. PAC Racing Springs PAC-S133-16 retainers are intended for use in properly engineered performance valvetrains where accurate component selection and assembly are essential.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-S133-16

• Design: Inside-style valve spring retainer

• Material: Chromoly steel

• Outside Diameter: 1.650 in

• Inside Diameter: 0.570 in

• Spring Inside Diameter: 0.630 in

• Thickness: 0.030 in

• Quantity: Set of 16

• Application: Performance and racing valvetrain assemblies