Speedmaster 7/16" Polylock Rocker Arm Nut Set for BBC 454 Stud Girdle PCE255.1008

The Speedmaster 7/16" Polylock Rocker Arm Nut Set (PCE255.1008) is a precision fastener assembly engineered for big-block Chevy (BBC) 454 engine builds using a stud girdle configuration. The Polylock design ensures secure, vibration-resistant fastening critical for high-performance engine applications where rocker arm stability is essential.

This nut set is purpose-built for BBC 454 stud girdle setups, delivering the specialized hardware required for proper rocker arm mounting and alignment. The 7/16" size specification matches OEM and performance build standards, making it an ideal choice for engine rebuilds, performance upgrades, and competition engine assembly where precision hardware is non-negotiable.

Key Features & Benefits

• 7/16" Polylock Design: Polylock feature provides vibration-resistant fastening for rocker arm stability in high-RPM engine applications.
• BBC 454 Specific Fitment: Engineered specifically for big-block Chevy 454 stud girdle configurations.
• Precision Fastener Set: Complete nut set designed for rocker arm assembly and mounting applications.
• High-Performance Engine Grade: Purpose-built for serious engine builds and competition applications requiring reliable fastening.

Specifications

Ideal Applications

• BBC 454 engine rebuilds and assembly
• High-performance big-block Chevy engine builds
• Competition engine construction
• Rocker arm mounting in stud girdle setups