PAC Racing Springs PAC-R311-16 300 Series 7-Degree Chromoly Valve Spring Retainers for GM LS-Series Engines

PAC Racing Springs PAC-R311-16 valve spring retainers are designed for GM LS-series engines using beehive valve springs. This set of 16 retainers features a 7-degree design and a stepped outer profile engineered to provide reliable spring location and consistent valvetrain operation. The 300 Series construction is well suited for performance applications that demand durable, accurately manufactured components.
Constructed from chromoly steel, these valve spring retainers offer the strength and wear resistance needed for high-performance engine environments. The stepped design accommodates compatible beehive springs while supporting proper spring and retainer alignment during operation. Their precise fit helps maintain valvetrain stability and contributes to dependable engine performance under demanding conditions.
The PAC-R311-16 set includes 16 retainers for a complete engine installation. These retainers are intended for use with compatible PAC Racing Springs valve springs, locks, and GM LS-series cylinder head components; verify application and valvetrain compatibility before installation. PAC Racing Springs is recognized for developing performance valvetrain components for racing, street performance, and high-output engine builds.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-R311-16

• Product Type: Valve spring retainers

• Series: 300 Series

• Material: Chromoly steel

• Retainer Style: Stepped design for beehive valve springs

• Lock Angle: 7 degrees

• Outer Diameter: 0.640 inches

• Application: GM LS-series engines

• Quantity: Set of 16