Manley Performance Stroker Series Piston Set

Chrysler 6.4L HEMI 4.090 Bore -20.5cc Dish

599900C-8

Overview:

The Manley Performance Stroker Series Piston Set is engineered specifically for Chrysler 6.4L HEMI engines with a 4.090-inch bore and a -20.5cc dish design. These pistons are designed to enhance engine performance, durability, and reliability for enthusiasts and professional engine builders alike.

Whether you are building a high-performance street engine, a race motor, or a stroker build, this piston set offers the strength and precision needed to handle increased power and demanding conditions. You’ll get a proven design that supports improved combustion efficiency and long-term durability under high stress.

Key Features:

Manley’s Stroker Series pistons incorporate advanced materials and design elements to deliver superior performance and reliability:

• Forged from premium 2618 aluminum alloy for exceptional strength and fatigue resistance.
• Proven cam and barrel skirt profiles reduce friction and wear for smoother operation.
• Tool steel wrist pins provide enhanced durability and precise fitment.
• Moly skirt coatings on select part numbers reduce friction and improve piston-to-cylinder wall interaction.
• 20.5cc dish design optimizes combustion chamber volume for stroker engine configurations.
• Compatible with a 4.090-inch bore, ideal for Chrysler 6.4L HEMI stroker builds.
• Designed to withstand high RPM and increased cylinder pressures common in performance applications.
• Manufactured to tight tolerances ensuring consistent fit and performance across all pistons in the set.

Construction & Design:

These pistons are crafted using Manley’s signature "Platinum Series" manufacturing process, which emphasizes quality and precision. The 2618 alloy forging offers superior strength compared to standard aluminum alloys, making it ideal for high-performance and racing engines.

The cam and barrel skirt profiles have been extensively tested to reduce piston slap and improve ring seal, contributing to longer engine life and better efficiency. The inclusion of tool steel wrist pins ensures a robust connection between the piston and connecting rod, capable of handling increased loads.

Additionally, the moly skirt coating on select pistons reduces friction and wear, enhancing durability and performance under demanding conditions.

Installation & Fitment:

This piston set is designed as a direct fit for Chrysler 6.4L HEMI engines with a 4.090-inch bore, specifically suited for stroker engine builds requiring a -20.5cc dish piston. Installation requires standard engine assembly procedures and precise machining to ensure proper clearances and fitment.

These pistons are intended for professional engine builders and experienced enthusiasts familiar with stroker engine assembly. No special modifications beyond typical stroker build requirements are necessary.

What's Included:

• Complete set of forged 2618 alloy pistons with -20.5cc dish design
• Tool steel wrist pins
• Moly skirt coatings applied on select pistons

Ideal For:

• Performance enthusiasts building stroker engines on Chrysler 6.4L HEMI platforms
• Professional engine builders seeking durable, high-strength pistons for high-RPM applications
• Street and race engines requiring reliable pistons capable of handling increased cylinder pressures
• Those upgrading their engine’s bore size to 4.090 inches with a -20.5cc dish piston configuration

Manley Performance manufactures high-strength engine internals for serious builds—especially forged pistons, connecting rods, valves, and valvetrain components developed for racing and high-output street applications. If you’re building for boost, high compression, or sustained RPM, Manley is a common choice for parts engineered to take abuse and keep power reliable.