PAC Racing Springs PAC-R408-16 400 Series Titanium Valve Spring Retainers, 10-Degree, Dual Spring, Set of 16

PAC Racing Springs PAC-R408-16 valve spring retainers are designed for high-performance engine applications using dual valve springs. Manufactured from lightweight titanium, these retainers help reduce valvetrain mass while providing the strength and durability required for demanding racing and performance use. The 10-degree design is engineered for compatible valve spring and locking systems, supporting precise component alignment and dependable operation.
The 400 Series retainers feature stepped spring-seat geometry for applications using valve springs with a 1.040-inch and 0.715-inch outside diameter configuration. This design promotes proper spring positioning and helps maintain consistent valvetrain function under high engine speeds. The retainers are supplied as a complete set of 16, making them suitable for an eight-cylinder engine with dual valve springs at each cylinder, subject to application requirements.
PAC Racing Springs is recognized for developing specialized valvetrain components for performance engines, and the PAC-R408-16 reflects that focus with a purpose-built combination of titanium construction, 10-degree locking geometry, and dual-spring compatibility. Verify valve, lock, spring, and retainer specifications before installation to ensure proper fit and clearance. These retainers are supplied without installation hardware and should be used only with compatible components.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-R408-16

• Series: 400 Series

• Material: Titanium

• Retainer Type: Valve spring retainer

• Lock Angle: 10 degrees

• Spring Compatibility: Dual spring applications

• Stepped Outside Diameters: 1.040 inches and 0.715 inches

• Quantity: Set of 16

• Application: High-performance and racing engine valvetrains