Speedmaster LS1 1.8 Ratio DNA Aluminum Roller Rocker Arms Set – Chevy GM Engine

This is a complete roller rocker arm set engineered for Chevrolet and GM LS1 engines, featuring a 1.8 ratio design and shaft-mounted installation. The Speedmaster 1-261-023 delivers aluminum construction with DNA-series engineering, providing durability and performance for high-revving LS engine applications. The 1.8 ratio geometry optimizes valve lift and timing characteristics for improved engine responsiveness and reliability.

These roller rocker arms are designed for builders and enthusiasts seeking OEM-compatible fitment with modern performance upgrades. The aluminum roller design reduces friction and wear compared to stock components, supporting both street and track use. Speedmaster's DNA series represents a proven platform for LS engine modifications, offering a complete solution that simplifies installation while maintaining factory-style mounting architecture.

Key Features & Benefits

• 1.8 Ratio Design: Optimized ratio geometry enhances valve actuation and engine response on LS1 platforms.
• Aluminum Roller Construction: Durable aluminum body with roller design minimizes friction and extends component life.
• LS1 Shaft Mount: Shaft-mounted configuration provides direct compatibility with Chevy GM LS1 engine blocks.
• DNA Series Engineering: Speedmaster's DNA platform ensures consistent quality and proven performance.
• Complete Set: Full rocker arm set included; ready for installation on compatible LS1 engines.

Specifications

Ideal Applications

• LS1 engine builds and modifications
• Street performance and high-revving applications
• Track and racing engine upgrades
• Engine rebuilds and restorations