PAC Racing Springs PAC-S135-16 Chromoly Valve Spring Retainers for RPM Dual Springs

PAC Racing Springs PAC-S135-16 valve spring retainers are designed for use with RPM dual valve spring assemblies featuring a 0.570-inch spring inside diameter. Manufactured from durable chromoly steel, these inside-style retainers provide dependable spring location and support in high-performance valvetrain applications. The precision-focused design helps maintain proper spring alignment while supporting consistent operation under demanding engine conditions.
The PAC-S135-16 retainers feature a 0.060-inch thickness, a 1.270-inch outside diameter, and a 0.570-inch inside diameter. Their spring seat configuration is engineered specifically for RPM dual springs, making them a practical choice for performance engine builders, cylinder head specialists, and replacement applications requiring compatible PAC Racing Springs components.
This set includes 16 chromoly valve spring retainers for convenient installation across a complete engine valvetrain. PAC Racing Springs is recognized for developing specialized valve spring and valvetrain components for racing and high-performance use, and the PAC-S135-16 delivers the fit-focused design needed for reliable spring control. Verify spring and retainer compatibility before installation to ensure proper seating, clearance, and valvetrain geometry.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-S135-16

• Product Type: Inside valve spring retainer

• Material: Chromoly steel

• Application: For RPM dual valve springs

• Spring Inside Diameter: 0.570 inches

• Retainer Thickness: 0.060 inches

• Retainer Outside Diameter: 1.270 inches

• Retainer Inside Diameter: 0.570 inches

• Quantity: Set of 16