Speedmaster Mopar Chrysler BB 383 440 1.5 Ratio DNA Aluminum Roller Rocker Arms Set 1-261-026

The Speedmaster Mopar Chrysler BB 383 440 Shaft 1.5 Ratio DNA Aluminum Roller Rocker Arms Set (1-261-026) is a complete rocker arm assembly designed for big-block Mopar engine builds. This set delivers improved valve actuation through aluminum roller rocker arms engineered for the 383 and 440 cubic-inch Chrysler platforms, making it a trusted choice for engine rebuilds and performance modifications.

Built with DNA aluminum construction and a 1.5 mechanical advantage ratio, this rocker arm set optimizes valve lift and duration for enhanced engine performance. The roller design reduces friction and wear compared to traditional stamped rockers, extending component life and reliability. The shaft-mount configuration provides secure, balanced rocker arm operation across the entire valve train, whether you're restoring a classic Mopar engine or upgrading for increased horsepower.

Key Features & Benefits

• DNA Aluminum Construction: Engineered aluminum roller rocker arms for durability and reduced weight in high-performance applications.
• 1.5 Ratio Design: Mechanical advantage ratio optimizes valve lift and valve train geometry for the 383 and 440 big-block engines.
• Roller Design: Roller rockers minimize friction and wear on pushrods and valve stems for longer service life.
• Complete Shaft Set: Full rocker arm assembly ready for installation on compatible Mopar Chrysler big-block platforms.

Specifications

Ideal Applications

• Engine rebuilds for 383 and 440 Mopar Chrysler big-block engines
• Performance upgrades to increase valve actuation efficiency
• Classic car restoration on vintage Mopar platforms
• High-performance street and racing engine builds