Speedmaster PCE255.1003 3/8" Polylock Rocker Arm Nut Set for Stainless Roller Rockers

The Speedmaster PCE255.1003 polylock rocker arm adjusting nut set is engineered for use with full roller rocker arms featuring stainless steel construction. These precision-manufactured adjusters deliver the durability and reliability demanded by high-performance engine builds.

Key Features:

• Constructed from heat-treated 4140 chromoly steel for exceptional strength
• 190,000 PSI tensile strength ensures maximum reliability under extreme valve train loads
• Precision CNC-machined threads provide optimal seat pressure and accurate adjustments
• Flush-machined set screws ensure proper contact and secure locking on rocker studs
• 3/8" thread size designed specifically for stainless steel roller rocker arms
• No special tools required for installation and adjustment

These polylock nuts eliminate the need for jamb nuts while providing secure, vibration-resistant valve lash settings. The integrated locking mechanism maintains precise valve adjustments even under high-RPM operation, making them ideal for performance street engines and race applications.