Manley Performance Stroker Series Extreme Duty Piston Set

Chrysler 6.4L HEMI 4.090 Bore -20.5cc Dish

599900CE-8

Overview:

The Manley Stroker Series Extreme Duty Piston Set is engineered specifically for Chrysler 6.4L HEMI engines with a 4.090-inch bore and a -20.5cc dish volume. Designed for high-performance builds, these pistons are ideal for professional engine builders, tuners, and enthusiasts seeking enhanced durability and reliability under extreme conditions.

Crafted from premium 2618 alloy forgings, this piston set offers superior strength and thermal resistance, making it well-suited for stroker applications and high-boost environments. Whether you are building a street performance engine or a race-ready powerplant, these pistons provide the foundation for consistent power and long-term engine health.

Key Features:

Manley’s Stroker Series pistons incorporate advanced design and materials to meet the demands of extreme duty applications. Key features include:

• Forged from high-strength 2618 aluminum alloy for excellent durability and heat resistance.
• Proven cam and barrel skirt profiles to reduce friction and wear while maintaining tight clearances.
• Tool steel wrist pins for enhanced strength and reduced risk of failure under high loads.
• Moly skirt coatings on select part numbers to improve lubrication and minimize piston skirt scuffing.
• 20.5cc dish design optimized for compression ratio tuning and combustion chamber clearance.
• Precision machining to ensure exact bore sizing and consistent piston-to-wall fitment.
• Designed to support stroker crankshaft configurations and increased displacement setups.

Construction & Design:

These pistons are meticulously crafted using Manley’s signature Platinum Series manufacturing process. The 2618 alloy forging provides a robust microstructure that withstands high cylinder pressures and elevated temperatures common in performance engines. The cam and barrel skirt profiles are engineered to reduce piston slap and improve ring seal, contributing to enhanced efficiency and longevity.

Each piston features a carefully designed dish volume of -20.5cc, allowing for precise compression ratio adjustments tailored to your build requirements. The inclusion of tool steel wrist pins ensures a secure connection between the piston and connecting rod, capable of handling the stresses of high RPM and boost levels.

Installation & Fitment:

This piston set is designed for direct fitment in Chrysler 6.4L HEMI engines with a 4.090-inch bore, commonly found in stroker builds. Proper machining and assembly practices are recommended to ensure optimal performance and reliability. These pistons are compatible with existing engine components designed for the specified bore and dish volume.

• Fits Chrysler 6.4L HEMI engines with 4.090" bore diameter.
• Intended for stroker engine configurations requiring -20.5cc dish pistons.
• Professional installation and engine blueprinting recommended for best results.

What’s Included

• Complete set of forged 2618 alloy pistons with -20.5cc dish volume
• Tool steel wrist pins
• Moly skirt coatings applied where specified
• Precision-machined piston skirts and pin bores

Ideal For:

• Engine builders and tuners working on Chrysler 6.4L HEMI stroker engines
• Performance enthusiasts seeking durable pistons for high-boost or high-RPM applications
• Street and race engines requiring reliable, extreme duty piston components
• Those aiming to optimize compression ratio and combustion efficiency with a -20.5cc dish design

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.