Wiseco Professional Series Forged Pistons

Chrysler 6.4L Gen III HEMI

K0399X05

Overview:

The Wiseco Professional Series forged pistons are precision-engineered components designed specifically for the Chrysler 6.4L Gen III HEMI engine. Built 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 high-horsepower race engine or a demanding street/strip setup, these pistons provide the reliability and performance needed to push your build beyond factory limits. Each set includes eight pistons, crafted to exacting tolerances to ensure optimal fit and function in your Gen III HEMI.

Key Features:

Wiseco’s Professional Series pistons incorporate advanced design and manufacturing techniques to meet the needs of high-performance enthusiasts and professional racers alike. Key features include:

• Forged construction for superior strength and resistance to high stress and heat.
• Designed specifically for the Chrysler 6.4L Gen III HEMI engine platform.
• 4.095-inch bore size optimized for precise cylinder fitment.
• 6.125-inch connecting rod length for improved rod-to-stroke ratio and engine dynamics.
• 0.927-inch wrist pin diameter engineered for durability under extreme loads.
• Includes premium piston rings to enhance sealing and reduce blow-by.
• Compression height of 1.125 inches tailored for proper deck clearance and combustion chamber volume.
• Custom-level performance features designed to handle heavy-duty race conditions.
• Manufactured with tight tolerances to ensure consistent performance and reliability.

Construction & Design:

These pistons are forged from high-grade aluminum alloy, providing an excellent balance of lightweight construction and high strength. The forging process enhances grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue even under severe racing conditions.

The design incorporates a precise bore diameter and compression height to maintain optimal piston-to-cylinder wall clearance and combustion efficiency. The wrist pin diameter and rod length are carefully selected to improve engine balance and reduce reciprocating mass, contributing to smoother operation and increased durability.

Installation & Fitment:

This piston set is engineered as a direct fit replacement for the Chrysler 6.4L Gen III HEMI engine. Installation requires standard engine assembly procedures, and the pistons are compatible with factory connecting rods and cylinder bores sized to 4.095 inches.

No modifications such as cutting, drilling, or special tuning are necessary beyond typical engine build practices. Proper ring end gap and piston clearance measurements should be verified during installation to ensure optimal performance and longevity.

What's Included:

• Set of 8 forged pistons
• Premium piston rings installed

Ideal For:

• Professional and serious amateur race engine builds
• High-performance street and strip applications
• Builders requiring durable pistons for heavy to severe duty use
• Chrysler Gen III HEMI engine enthusiasts upgrading for increased reliability and power

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.