COMP Cams 4604-1 High Energy Polylock Rocker Arm Adjusting Nut for Stud - 3/8

The COMP Cams 4604-1 High Energy Polylock is a precision-engineered rocker arm adjusting nut designed for high-performance engines with 3/8" rocker studs. This polylock-style nut provides secure valve lash adjustment while preventing loosening under high-RPM and high-stress operating conditions.

Key Features:

• Polylock design with integrated locking mechanism eliminates the need for separate jam nuts
• Fits standard 3/8" rocker arm studs commonly found in small block Chevrolet and other domestic V8 engines
• Durable steel construction with precision threads for accurate valve lash adjustment
• Maintains consistent valve train geometry and lash settings even under extreme conditions
• Easy installation with standard wrench—simply adjust to desired lash and tighten the polylock collar

This polylock nut is ideal for performance applications where maintaining precise valve train settings is critical, including street performance, bracket racing, and circle track engines. The self-locking design ensures your valve adjustments stay put throughout the RPM range.