Manley Performance Platinum Series Pistons

Chrysler HEMI 6.4L (392) 4.095in Bore / 3.724in Stroke

598805C-8

Overview:

The Manley Performance Platinum Series Pistons are precision-engineered forged pistons designed specifically for the Chrysler 6.4L HEMI engine. Crafted to exacting standards, these pistons deliver outstanding strength and durability for high-performance builds. Whether you are a professional engine builder or a serious enthusiast, these pistons provide the reliability and performance needed to handle increased power and demanding conditions.

Built to withstand the rigors of street, strip, or track applications, these pistons help optimize combustion efficiency and engine response. The 1.75cc dome design supports higher compression ratios, enhancing power output while maintaining excellent durability. With Manley’s reputation for quality, you can trust these pistons to perform consistently in your Chrysler HEMI 6.4L build.

Key Features:

Manley’s Platinum Series Pistons incorporate advanced materials and design features to ensure superior performance and longevity:

• Forged from premium 2618 aluminum alloy for exceptional strength and fatigue resistance.
• Proven cam and barrel skirt profiles reduce friction and wear for improved efficiency and durability.
• Equipped with tool steel wrist pins for enhanced strength and precise fitment.
• Moly skirt coatings on select part numbers reduce friction and help protect against scuffing.
• 1.75cc dome piston design supports increased compression ratios for better power and combustion.
• Standard bore size of 4.095 inches and stroke of 3.724 inches tailored for Chrysler 6.4L HEMI applications.
• Designed to meet the demands of professional engine builders and tuners seeking reliable, high-performance components.

Construction & Design:

The Platinum Series Pistons are manufactured using a high-quality 2618 aluminum alloy forging process, which provides superior strength compared to cast pistons. This alloy is well known for its ability to withstand high thermal and mechanical stresses common in performance engines. The pistons feature carefully engineered cam and barrel skirt profiles that minimize friction and improve piston stability within the cylinder bore.

Tool steel wrist pins ensure a secure and durable connection between the piston and connecting rod, while the moly skirt coatings on select models reduce wear and improve piston ring seal. The dome shape of the piston crown is optimized for efficient combustion chamber dynamics, supporting higher compression ratios without compromising reliability.

Installation & Fitment:

These pistons are designed as direct replacements for the Chrysler 6.4L HEMI engine, matching the factory bore and stroke dimensions. They fit standard cylinder bores with a 4.095-inch diameter and a 3.724-inch stroke, making them suitable for rebuilds or performance upgrades on compatible engines.

Installation requires standard engine assembly procedures. No special modifications to the engine block or components are necessary beyond typical machining and fitting practices. These pistons are intended for use by experienced engine builders and require proper balancing and ring installation to ensure optimal performance.

What’s Included

• Complete set of forged 2618 alloy pistons with 1.75cc dome design
• Tool steel wrist pins
• Moly skirt coatings applied on select piston skirts
• Detailed specifications for bore, stroke, and dome volume

Ideal For:

• Performance enthusiasts upgrading Chrysler 6.4L HEMI engines
• Professional engine builders seeking durable forged pistons
• Street, strip, and track applications requiring reliable high-compression pistons
• Rebuilds and custom engine builds aiming for improved power and durability

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.