Wiseco Professional Series Forged Pistons

Chrysler 6.4L Gen III HEMI

K0398X1

Overview:

The Wiseco Professional Series forged pistons are precision-engineered components designed specifically for the Chrysler 6.4L Gen III HEMI engine. Crafted for serious racers and high-performance builders, these pistons deliver exceptional strength and durability to withstand the rigors of heavy to severe duty race applications.

Whether you are building a competitive race engine or upgrading your performance build, these pistons provide the reliability and custom-level features needed to push your engine to its limits. With premium rings included, you’ll get a complete piston set that supports enhanced combustion efficiency and long-term durability.

Key Features:

These pistons incorporate advanced design and manufacturing techniques to meet the demands of high-performance and racing environments:

• Forged construction for superior strength and resistance to high stress and heat.
• 4.100 inch bore size optimized for the Chrysler 6.4L Gen III HEMI engine.
• 1.125 inch compression height designed to maintain proper piston-to-cylinder geometry.
• 0.8661 inch wrist pin diameter for robust pin connection and reduced wear.
• 9.5cc dish volume to achieve a targeted compression ratio suitable for performance tuning.
• Professional Series pistons come with premium piston rings for enhanced sealing and durability.
• Engineered for heavy to severe duty race builds, ensuring reliability under extreme conditions.
• Precision machining and quality control to maintain tight tolerances and consistent performance.

Construction & Design:

Wiseco’s Professional Series pistons are forged from high-grade aluminum alloy, providing an excellent balance of lightweight design and exceptional strength. The forging process enhances the metal’s grain structure, resulting in pistons that resist cracking and deformation under high cylinder pressures and temperatures.

The pistons feature a carefully designed dish volume of -9.5cc, which helps optimize combustion chamber shape and compression ratio for the 6.4L Gen III HEMI engine. The 1.125 inch compression height ensures proper piston positioning relative to the cylinder deck, maintaining ideal ring seal and piston-to-valve clearance.

Each piston is finished with precision machining to exact specifications, including the 0.8661 inch pin bore diameter that accommodates the wrist pin with minimal play for improved durability and reduced friction.

Installation & Fitment:

This set of eight pistons is designed as a direct fit replacement for Chrysler Gen III 6.4L HEMI engines. They are intended for professional engine builders and racers who require high-performance components capable of handling increased power and stress.

Installation should be performed by experienced technicians familiar with high-performance engine assembly. Proper ring installation and piston orientation are critical for optimal performance and longevity.

What's Included:

• Set of 8 forged pistons
• Premium piston rings included with the set

Ideal For:

• Serious racers and professional engine builders
• High-performance Chrysler 6.4L Gen III HEMI engine builds
• Heavy to severe duty race applications requiring durable forged pistons
• Builders seeking custom-level performance and reliability in piston components

Wiseco is a forged piston and engine-components brand trusted in both automotive and powersports performance, offering precision-made pistons and kits for high-RPM, high-boost, and high-load builds. Whether you’re rebuilding for durability or chasing serious horsepower, Wiseco parts are chosen for strength, consistency, and proven performance in demanding conditions.