Speedmaster Mopar Chrysler BB 383 440 1.5 Ratio Aluminum Roller Rocker Arms & Shafts PCE261.1033.01

The Speedmaster PCE261.1033.01 is a set of aluminum roller rocker arms and shafts engineered for Mopar Chrysler big-block 383 and 440 engines with a 1.5 ratio. These roller rocker arms deliver reduced friction and improved valve actuation compared to traditional stamped steel rockers, supporting higher RPM capability and consistent performance across the full engine range.

Designed for street and mild performance applications, this rocker arm assembly offers reliability and durability through premium aluminum construction paired with roller bearings. The 1.5 ratio geometry provides the precise mechanical advantage needed for these classic Mopar big-block platforms. Installation requires standard pushrod engine modifications and is ideal for restorations, performance rebuilds, and vintage muscle car projects where original or OEM-equivalent valvetrain architecture is desired.

Key Features & Benefits

• Aluminum Roller Rockers: Lightweight aluminum construction with roller bearing design reduces friction and wear for smoother valve operation.
• 1.5 Ratio Geometry: Factory-correct ratio engineered specifically for Mopar Chrysler BB 383 and 440 engines.
• Includes Shafts: Complete assembly with matched rocker shafts for direct bolt-on installation and proper support.
• Performance Valvetrain: Enables reliable, high-RPM valve actuation for street and mild performance use.

Specifications

Ideal Applications

• Mopar 383 and 440 big-block engine rebuilds and restorations
• Vintage muscle car valvetrain upgrades
• Street performance and mild racing applications
• Classic Chrysler engine modifications