Speedmaster Chevy GM LS1 1.7 Ratio DNA Aluminum Roller Rocker Arms Set 1-261-010

The Speedmaster Chevy GM LS1 1.7 Ratio DNA® Aluminum Roller Rocker Arms Set (MPN 1-261-010) is a precision-engineered engine component designed for LS1 performance builds and restorations. These aluminum roller rocker arms deliver the 1.7:1 ratio specification required for optimal valve actuation and engine efficiency on LS1-based powerplants.

This rocker arm set is constructed from durable aluminum and features roller design for reduced friction and improved valve train reliability. The DNA® designation indicates advanced engineering for consistent performance across high-RPM applications. Ideal for engine builders, restoration enthusiasts, and performance shops working on Chevy LS1 engines, these rocker arms are a critical component for maintaining proper valve operation and maximizing engine output. Compatible with standard LS1 cylinder head configurations, they integrate seamlessly into both stock and modified engine builds.

Key Features & Benefits

• 1.7 Ratio Design: Engineered specifically for LS1 cylinder head compatibility and optimal valve lift ratios.
• Aluminum Construction: Lightweight material reduces overall valve train mass for improved engine response.
• Roller Design: Roller bearings minimize friction for enhanced durability and reliability.
• DNA® Precision Engineering: Advanced manufacturing standards ensure consistent performance and fitment.
• LS1 Compatibility: Designed to fit standard Chevy GM LS1 engine configurations.

Specifications

Ideal Applications

• LS1 engine builds and performance upgrades
• Engine restoration and rebuilds
• High-RPM performance applications
• Custom engine assembly and tuning