PAC Racing Springs PAC-R658-16 600 Series Mini 8-Degree Valve Spring Retainers, 16-Piece Set

Upgrade valve train performance with PAC Racing Springs PAC-R658-16 600 Series valve spring retainers. Designed for dual-spring applications, these retainers feature a mini 8-degree configuration and stepped outer diameters for secure spring alignment and dependable operation. The steel construction provides the strength and durability required for demanding performance engine use.
The PAC-R658-16 set includes 16 valve spring retainers engineered for compatibility with PAC 600 Series valve springs and related performance cylinder head components. Their stepped design supports proper spring positioning while helping maintain consistent valve train geometry through the engine’s operating range. The mini 8-degree angle is suited to applications using matching 8-degree valve locks and components.
Each retainer is produced for precise fitment and reliable service in high-performance builds, including racing and modified street engines. Before installation, verify valve lock angle, spring compatibility, retainer clearance, installed height, and valve train geometry against your specific cylinder head and spring combination. Use the PAC Racing Springs part number PAC-R658-16 when confirming application requirements and replacement fitment.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-R658-16

• Series: 600 Series

• Application: Dual valve spring systems

• Lock Angle: Mini 8-degree

• Retainer Material: Steel

• Spring Compatibility: Stepped design for 0.880-inch and 0.615-inch outside diameter springs

• Quantity: Set of 16

• Use: High-performance and racing engine valve trains