Speedmaster Chevy BBC 454 Shaft 1.7 Ratio DNA Aluminum Roller Rocker Arms Set

The Speedmaster Chevy BBC 454 Shaft 1.7 Ratio DNA® Aluminum Roller Rocker Arms Set is a premium valvetrain component designed for big-block Chevrolet 454 engines. This roller rocker arm assembly delivers improved valve actuation and engine efficiency for both street and performance applications. The 1.7 ratio design optimizes valve lift geometry for enhanced breathing and responsiveness.

Constructed from high-quality aluminum, these DNA® rocker arms provide a lightweight alternative to heavier cast-iron designs while maintaining durability under demanding conditions. The shaft-mount configuration ensures stable, precise valve control, making this set ideal for engine rebuilds, performance upgrades, and custom builds. Whether you're restoring a classic muscle car or tuning a street rod, this Speedmaster set delivers the valvetrain precision serious enthusiasts demand.

Key Features & Benefits

• 1.7 Ratio Design: Optimized ratio for improved valve lift and engine breathing performance.
• Aluminum Construction: Lightweight DNA® aluminum material reduces overall valvetrain mass.
• Roller Design: Roller rocker arms minimize friction and wear on cam lobes and pushrods.
• Shaft Mount Configuration: Secure shaft-mount setup provides stable valve actuation control.
• BBC 454 Specific: Engineered and sized exclusively for Chevy big-block 454 engine applications.

Specifications

Ideal Applications

• Chevy 454 engine rebuilds and restoration
• Performance and high-revving engine builds
• Street rod and muscle car valvetrain upgrades
• Custom engine tuning and optimization