PAC Racing Springs PAC-R508 1.365 in Titanium Valve Spring Retainer, 10-Degree

The PAC Racing Springs PAC-R508 valve spring retainer is designed for high-performance valvetrain applications requiring reliable spring control and precise component fitment. This 500 Series retainer is manufactured from lightweight titanium to help reduce valvetrain mass while supporting consistent operation at elevated engine speeds. Its 10-degree design is engineered for compatible valve spring and lock configurations.
The PAC-R508 features stepped spring locating surfaces with 1.040-inch and 0.715-inch outside diameters, along with compatibility for 1.365-inch dual valve springs. These stepped dimensions help provide accurate spring positioning and support proper alignment within the valvetrain assembly. Use this retainer with matching PAC Racing Springs components and verify application requirements before installation.
Built for performance-oriented engine builds, the PAC Racing Springs PAC-R508 offers a durable, lightweight solution for demanding racing and competition environments. Each retainer is sold individually and is intended for professional engine assembly where correct spring, lock, valve, and retainer compatibility is essential. Confirm the required 10-degree lock angle and dual-spring application before ordering.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-R508

• Series: 500 Series

• Material: Titanium

• Retainer Type: Valve spring retainer

• Lock Angle: 10 degrees

• Spring Compatibility: Designed for 1.365-inch dual valve springs

• Stepped Outside Diameters: 1.040 inches and 0.715 inches

• Quantity: Sold individually