PAC Racing Springs PAC-S104-16 Chromoly Valve Spring Retainers, 1.550-Inch OD, 0.635-Inch ID, Set of 16

PAC Racing Springs PAC-S104-16 inside valve spring retainers are designed to provide a strong, dependable seating surface for performance valve spring assemblies. Manufactured from chromoly steel, these spring seats offer the durability and dimensional stability needed for high-performance cylinder head applications. The retainers feature a 0.060-inch thickness, a 1.550-inch outside diameter, and a 0.635-inch inside diameter for compatibility with appropriately matched valve spring and cylinder head components.
The PAC-S104-16 is designed for springs with a 0.770-inch inside diameter, helping maintain proper alignment and support during engine operation. Its inside-style configuration makes it a practical choice for applications requiring a secure interface between the valve spring and cylinder head. Proper component matching is recommended to confirm fitment, installed height, and spring compatibility before assembly.
This PAC Racing Springs set includes 16 chromoly valve spring retainers, making it suitable for complete engine builds, multi-cylinder service, or replacement of worn spring seats. Built for demanding performance use, these retainers provide consistent support and reliable service when installed according to the engine builder’s specifications.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-S104-16

• Component Type: Inside valve spring retainer

• Material: Chromoly steel

• Retainer Thickness: 0.060 inch

• Outside Diameter: 1.550 inches

• Inside Diameter: 0.635 inch

• Compatible Spring Inside Diameter: 0.770 inch

• Quantity: Set of 16