Wiseco Professional Series Forged Piston Set

2011–2024 Chrysler 300, Dodge Challenger, Dodge Charger, Dodge Durango, Jeep Grand Cherokee, Jeep Wrangler, Ram 2500, Ram 3500, Jeep Grand Wagoneer 6.4L 392 HEMI

Part #: K0399X05

Overview

The Wiseco Professional Series Forged Piston Set is engineered specifically for the Chrysler 6.4L Gen III HEMI engine, delivering exceptional strength and durability for high-performance applications. Designed for serious racers and performance builders, these pistons are built to withstand the extreme demands of heavy to severe duty racing and street/strip setups. Whether upgrading a factory engine or building a high-horsepower race motor, this piston set ensures reliable performance and longevity under intense conditions.

Each set includes eight precision-forged pistons crafted to exact tolerances, providing an optimal fit and function for the Gen III HEMI platform. These pistons are ideal for enthusiasts seeking to push their builds beyond factory limits with confidence.

Key Features

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

• Forged aluminum construction for superior strength, heat resistance, and durability
• Specifically designed 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 to withstand extreme loads
• Compression height of 1.125 inches tailored for proper deck clearance and combustion chamber volume
• Includes premium piston rings to enhance sealing and reduce blow-by
• Manufactured with tight tolerances to ensure consistent performance and reliability
• Custom-level performance features designed to handle heavy-duty race conditions

Construction & Design

These pistons are forged from high-grade aluminum alloy, balancing lightweight construction with exceptional strength. The forging process refines the grain structure of the metal, resulting in pistons that resist cracking, scuffing, and thermal fatigue even under severe racing conditions. This ensures long-lasting durability and reliable performance during heavy-duty use.

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 enhanced durability.

Installation & Fitment

This piston set is engineered as a direct fit replacement for the Chrysler 6.4L Gen III HEMI engine, compatible with factory connecting rods and cylinder bores sized to 4.095 inches. Installation follows standard engine assembly procedures without the need for modifications such as cutting, drilling, or special tuning 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.