Manley 13561-8 10-Degree Valve Locks Keepers 0.3415 in. Stem Diameter

These precision-machined valve locks are engineered to secure the valve retainer to the valve stem, maintaining proper valvetrain geometry under extreme rpm and high-lift camshaft conditions.

Key Specifications:

• Valve Stem Diameter: 0.3415 in.
• Lock Taper Angle: 10 degrees
• Style: Standard lock cap (Loccap)

Key Features:

• Machined to exacting tolerances for a secure, precise fit on the valve stem
• 10-degree taper design provides superior retainer-to-lock clamping force compared to standard 7-degree locks
• Compatible with Manley valve retainers and other quality aftermarket retainers using the 10-degree lock groove standard
• Ideal for naturally aspirated, turbocharged, supercharged, and nitrous-assisted builds
• Manufactured from high-strength steel for durability under sustained high-rpm operation

Manley Performance has been a trusted name in professional engine building for decades, supplying valvetrain components to top-tier motorsport and performance street applications. These valve locks are a direct complement to Manley's extensive line of performance valves, retainers, and springs.