Speedmaster Chevy BBC 454 1.7 Ratio 7/16" DNA® Aluminum Roller Rocker Arms Set 1-261-005

The Speedmaster Chevy BBC 454 1.7 Ratio 7/16" DNA® Aluminum Roller Rocker Arms Set (Model 1-261-005) is a complete roller rocker arm assembly designed for big-block Chevrolet 454 engines. These aluminum rocker arms deliver improved valve train geometry and reduced friction compared to stock components, enhancing engine performance and reliability in both street and performance applications.

Manufactured with DNA® aluminum construction, this set provides durable, lightweight valve train actuation with a 1.7 valve lift ratio and 7/16" stud diameter. The roller design minimizes wear on camshaft lobes and pushrods, extending component life and maintaining consistent valve timing and lift. Ideal for engine rebuilds, performance upgrades, and restoration projects on BBC 454-powered vehicles, these rocker arms are engineered to handle sustained high-RPM operation and demanding driving conditions.

Key Features & Benefits

• DNA® Aluminum Construction: Lightweight, durable aluminum design reduces weight while maintaining strength for reliable high-RPM performance.
• 1.7 Valve Lift Ratio: Optimized ratio for BBC 454 engines provides consistent valve actuation and improved flow characteristics.
• Roller Design: Minimizes friction and wear on camshaft lobes and pushrods, extending component life and reliability.
• 7/16" Stud Diameter: Proper fitment for BBC 454 engine specifications without modifications to existing hardware.
• Complete Set: Includes all rocker arms needed for full valve train replacement or upgrade on BBC 454 engines.

Specifications

Ideal Applications

• BBC 454 engine rebuilds and restorations
• High-performance engine upgrades and modifications
• Street and strip performance applications
• Engine valve train replacement and tuning